EN DE ES

Tools

All Tools

Open the right calculator, tool, or guide in seconds. No accounts, no friction.

Browse category hubs for the clearest entry point, then move into individual tool pages, guides, and comparisons from there.

Top Categories

All Tools

Productivity Tools

Age Calculator: Years, Months and Days

Calculate exact age from a birth date, review years, months, days, and total days lived, and see the next birthday countdown in one step.

Open tool

Free Gaming Tools & Calculators

Aim Sensitivity Visualizer

Visualize effective sensitivity, eDPI, and cm/360 with game-aware benchmark ranges.

Open tool

Online Developer Tools & Utilities

Base64 + Hashing Tool

Encode and decode Base64, create hashes, and compare outputs locally before you reuse text, payloads, or checksums.

Open tool

Math & Science Tools

Binomial Probability Calculator

Model discrete success scenarios with exact event probabilities and distribution stats.

Open tool

Lifestyle & Health Tools

BMI Calculator: Category and Healthy Range

Calculate BMI from height and weight, see the category instantly, and add waist circumference for more context when one number is not enough.

Open tool

Lifestyle & Health Tools

Body Fat Estimator

Estimate body fat with the US Navy formula, compare a BMI-based proxy, and review category ranges before your next check-in.

Open tool

Finance Calculators

Break-Even Calculator

Find how many units and how much revenue you need to cover fixed and variable costs before you set pricing targets.

Open tool

Lifestyle & Health Tools

Calorie Burn Estimator

Estimate calorie burn from activity type, body weight, and duration before comparing workouts or planning daily energy use.

Open tool

Productivity Tools

Case Converter

Convert text between everyday writing styles and developer naming formats in one live browser-based editor.

Open tool

Online Developer Tools & Utilities

Code Snippet Formatting Tool

Clean indentation, blank lines, and pasted code before you share it.

Open tool

Finance Calculators

Compound Interest Calculator: Growth and Inflation

Model long-term growth from starting capital, recurring contributions, and inflation before you commit to a savings plan.

Open tool

Construction Material Calculators

Concrete Mix Estimator

Model slab or cylindrical pours with waste, bag yield, and ready-mix comparisons.

Open tool

Construction Material Calculators

Concrete Volume Calculator

Estimate concrete volume from slab, footing, and column geometry with waste and truckload rounding.

Open tool

Lifestyle & Health Tools

Cooking Converter

Convert kitchen quantities across volume and weight with ingredient-aware density profiles.

Open tool

Productivity Tools

Countdown Timer

Set a target date and time, label the milestone, and watch a live browser-based countdown update in real time.

Open tool

Online Developer Tools & Utilities

Cron Expression Builder

Compose, validate, and preview standard 5-field cron schedules before you deploy jobs or change automation timing.

Open tool

Online Developer Tools & Utilities

CSV to JSON Converter

Paste CSV from a spreadsheet, detect the delimiter automatically, and generate clean JSON objects in one browser-based step.

Open tool

Finance Calculators

Currency Converter: Live Rates and Fees

Convert major currencies with live reference rates, fee adjustments, and batch amounts so you can sanity-check real transfer or payment scenarios fast.

Open tool

Productivity Tools

Date & Workday Calculator

Compare date spans or shift a deadline by calendar days and workdays with optional holiday exclusions in one browser-based tool.

Open tool

Productivity Tools

Days Between Dates Calculator

Compare two dates and get the exact day span, inclusive counting option, and a weekday versus weekend breakdown in one view.

Open tool

Productivity Tools

Deadline Back Planner

Back-plan start date and milestones from a fixed deadline, workload, and daily capacity.

Open tool

Discord Tools

Discord Emoji Markdown Builder

Build Discord emoji tags for custom and animated emoji, shortcode placeholders, and reaction payloads without guessing the format.

Open tool

Discord Tools

Discord Markdown Formatter

Wrap Discord text in the markdown style you need, preview the output, and copy clean message formatting before it goes live.

Open tool

Discord Tools

Discord Mention Builder

Create Discord mention syntax for users, roles, channels, slash commands, and high-impact pings before you post in a live server.

Open tool

Discord Tools

Discord Message Length Checker

Measure Discord text against message limits and break long posts into practical chunks before you send them.

Open tool

Discord Tools

Discord Permission Calculator

Build or decode Discord permission bitfields, review risky flags, and sanity-check role, channel, or bot access before it goes live.

Open tool

Discord Tools

Discord Role Color Preview

Check how a Discord role color reads in mentions, role labels, and chat samples on dark and light surfaces before you change it.

Open tool

Discord Tools

Discord Snowflake Decoder

Decode Discord IDs into timestamps and internal bit segments so you can audit object age, ordering, and copied IDs without an API.

Open tool

Discord Tools

Discord Spoiler Text Generator

Generate Discord spoiler markup in one step and hide either a whole message or just the lines you want to conceal.

Open tool

Discord Tools

Discord Text Case Converter

Clean Discord text casing fast and compare practical output styles before you send a rule, reply, or announcement.

Open tool

Discord Tools

Discord Timestamp Converter

Paste a Discord timestamp tag or Unix value and see readable local and UTC time, normalized syntax, and preview styles instantly.

Open tool

Discord Tools

Discord Timestamp Generator

Build Discord timestamp markup for events, reminders, announcements, and timezone-safe scheduling before you post.

Open tool

Discord Tools

Discord Webhook Embed Builder

Draft Discord webhook payloads with embeds, fields, and buttons, then preview the layout before sending anything to a live server.

Open tool

Finance Calculators

Dividend Yield Calculator

Calculate dividend yield, annual income, and yield on cost from your holdings before comparing dividend-paying stocks.

Open tool

Construction Material Calculators

Drywall Material Estimator

Plan sheet counts, fasteners, compound quantities, and budget in one pass.

Open tool

Math & Science Tools

Equation Solver

Solve linear, quadratic, and 2×2 linear systems with a numerical residual check on every result.

Open tool

Finance Calculators

FIRE Retirement Calculator

Estimate years to financial independence from spending, savings, returns, and withdrawal assumptions before you plan your next step.

Open tool

Construction Material Calculators

Flooring Calculator

Plan flooring material quantities and budget with deterministic calculations.

Open tool

Productivity Tools

Focus Timer Planner

Plan focused work cycles and break structure in seconds.

Open tool

Free Gaming Tools & Calculators

FPS Calculator & Hardware Performance Estimator

Estimate average FPS, lows, and bottleneck direction before you benchmark or upgrade.

Open tool

Free Gaming Tools & Calculators

Frametime Variance Analyzer

Turn raw frametime samples into jitter, spike, and percentile stability metrics: diagnose stutter that average FPS hides.

Open tool

Math & Science Tools

Function Plotter

Plot and diagnose custom expressions with range sampling, turning points, and integral estimates.

Open tool

Productivity Tools

Habit Streak Tracker

Analyze completion logs for current streak, longest streak, and recent consistency metrics.

Open tool

Lifestyle & Health Tools

Heart Rate Zone Calculator

Calculate 5-zone training ranges from max-HR formulas or a custom value and compare standard and Karvonen methods.

Open tool

Online Developer Tools & Utilities

HEIC to JPG: iPhone Photos, Browser-Based

Turn Apple HEIC and HEIF images into shareable JPG files locally in your browser without sending photos to a server.

Open tool

Web Utilities & SEO Tools

Hreflang Checker

Audit hreflang clusters for reciprocity, self-references, x-default coverage, and URL quality before search engines route users to the wrong locale.

Open tool

Finance Calculators

Inflation Calculator

See how inflation changes purchasing power and compare the real value of money across different time periods.

Open tool

Free Gaming Tools & Calculators

Input Lag Pipeline Calculator

From polling to display: break down pipeline latency and prioritize optimizations.

Open tool

Finance Calculators

Investment Fee Drag Calculator

Measure how fee differences reduce long-term portfolio value when contributions and returns stay the same.

Open tool

Finance Calculators

Investment Return Calculator

Calculate total return, annualized growth rate, and gain or loss from your investment results before comparing outcomes.

Open tool

Online Developer Tools & Utilities

JSON Formatter and Validator: JSONPath and Diff

Format, validate, diff, and inspect JSON in a browser-based workspace with JSONPath, schema checks, repair hints, and no uploads.

Open tool

Online Developer Tools & Utilities

JSON to CSV Converter

Turn structured JSON into spreadsheet-ready CSV, choose a delimiter, and flatten nested objects when needed in one browser-based workflow.

Open tool

Online Developer Tools & Utilities

JSON Validator: Syntax, Format and Minify

Check whether JSON is valid, jump to the exact syntax error, repair common issues, and format or minify the same payload locally.

Open tool

Online Developer Tools & Utilities

JWT Decoder & Validator

Decode JWT structure, inspect claims, and validate expiry, issuer, and audience rules with no server upload.

Open tool

Browser Tests & Diagnostics

Keyboard Tester Online

Check every key press, find ghosting or rollover problems, and test laptop or external keyboards before you troubleshoot or replace them.

Open tool

SEO & Marketing

Keyword Density Checker

Review top terms, keyword density, reading time, and target phrase coverage in one browser-based check before you publish or revise a page.

Open tool

Finance Calculators

Loan Amortization Calculator

Estimate monthly payments, total interest, and the full payoff schedule, then see how extra payments change the loan.

Open tool

Online Developer Tools & Utilities

Lorem Ipsum Generator

Generate deterministic placeholder copy for mockups, wireframes, QA, and draft content workflows.

Open tool

Online Developer Tools & Utilities

Markdown Preview Tool

Preview Markdown output while you write so you can catch heading, table, link, and code-block issues before publishing.

Open tool

Productivity Tools

Meeting Overlap Calculator

Find shared availability across two time zones, compare local work windows, and surface practical meeting slots.

Open tool

SEO & Marketing

Meta Tag Preview Generator

Draft core HTML head tags, check title and description length, and copy clean markup before you publish or hand off SEO changes.

Open tool

Finance Calculators

Mortgage Affordability Planner

Work out a safer home-buying range with full housing costs, DTI limits, and higher-rate stress testing built in.

Open tool

Free Gaming Tools & Calculators

Mouse DPI & Sensitivity Calculator

Calculate DPI, eDPI, and cm/360, then convert sensitivity between FPS games so your aim feels consistent across titles.

Open tool

Free Gaming Tools & Calculators

Mouse Polling Rate Test & Checker

Compare 1000, 2000, 4000, and 8000 Hz behavior and plan a stable setup.

Open tool

SEO & Marketing

Open Graph Preview Tool

Preview link-card titles, descriptions, and images before a page is shared across social feeds, chats, or messaging apps.

Open tool

Construction Material Calculators

Paint Calculator

Estimate paint for walls, ceilings, trim, and primer, then work out can count, waste, and cost before you head to the store.

Open tool

Productivity Tools

Password Generator: Custom Rules and Strength

Generate strong browser-based passwords with custom length, character rules, exclusion filters, and a quick strength estimate before you copy.

Open tool

Online Developer Tools & Utilities

PDF Metadata Remover

Strip standard PDF document-info metadata locally, review what was cleared, and download a cleaner file before sharing.

Open tool

Math & Science Tools

Percentage Converter

Switch between percentages, decimals, fractions, and ratios, then calculate percentage of, percentage change, and difference.

Open tool

Productivity Tools

Pomodoro Timer

Set work and break intervals, then run a local Pomodoro timer that tracks focus blocks and upcoming breaks.

Open tool

Finance Calculators

Portfolio Drawdown Analyzer

Project growth and stress behavior with drawdown, recovery, and real-return diagnostics.

Open tool

Productivity Tools

Priority Matrix Planner

Classify tasks into urgency-impact quadrants and rank execution order with weighted scoring.

Open tool

Free Gaming Tools & Calculators

Pro Player Settings Comparison Tool

Compare manual profiles or pro presets with game-specific eDPI benchmark ranges.

Open tool

Finance Calculators

Profit Margin Calculator

Calculate margin and markup percentages from revenue and cost figures.

Open tool

Math & Science Tools

Quadratic Equation Solver

Solve the equation and interpret the parabola in one run.

Open tool

Productivity Tools

Random Name Picker

Pick one or several names from a pasted list, optionally remove winners, and keep the whole draw private in your browser.

Open tool

Productivity Tools

Random Number Generator

Generate one or many random values inside a custom range, choose unique mode, and switch between integers and decimals in seconds.

Open tool

Browser Tests & Diagnostics

Reaction Time Test

Measure reaction speed with a mobile-first pad, trustworthy median scoring, integrity checks, local history, and cleaner post-session coaching.

Open tool

Free Gaming Tools & Calculators

Refresh Rate Response Time Checker

Evaluate refresh rate and response time together, not as isolated specs, to understand real motion clarity and overdrive risk.

Open tool

Online Developer Tools & Utilities

Regex Tester: Patterns, Flags and Matches

Debug JavaScript regex with live matches, capture groups, test cases, and replacement previews in a browser-based workspace.

Open tool

Finance Calculators

Rent vs Buy Calculator

Compare renting and buying over the years you actually expect to stay, then see how equity, closing costs, and invested cash change the better move.

Open tool

Roblox Tools

Roblox Asset ID Extractor

Extract Roblox asset IDs from URLs or mixed text quickly so Studio, moderation, and creator notes start with clean numbers.

Open tool

Roblox Tools

Roblox Asset URL Parser

Parse Roblox asset links into route, query, and ID details so you can understand what a URL carries before you reuse it.

Open tool

Roblox Tools

Roblox Badge Icon Safe Area Preview

Preview uploaded Roblox badge art inside a circular safe area so important details stay visible after icon-style cropping.

Open tool

Roblox Tools

Roblox Badge and Icon Size Checker

Check Roblox badge or game icon dimensions quickly so square-canvas and small-display issues show up early.

Open tool

Roblox Tools

Roblox BrickColor and Color3 Converter

Move between named Roblox BrickColor values and Color3-ready output without guessing which Studio color snippet to use.

Open tool

Roblox Tools

Roblox Color Palette to Color3 Exporter

Convert a Roblox palette into copy-ready Color3 lines for Studio themes, UI configs, and shared design tokens with local preview.

Open tool

Roblox Tools

Roblox DevEx Calculator

Estimate DevEx cash value from eligible Earned Robux, or work backward from a payout target using a clear rate assumption.

Open tool

Roblox Tools

Roblox Display Name Length Checker

Measure a Roblox display-name draft quickly, clean up spacing, and keep the check focused on length and readability instead of fake live validation.

Open tool

Roblox Tools

Roblox Game Icon Safe Area Preview

Preview Roblox game icon artwork inside a centered safe frame so key details hold up when the icon shrinks down.

Open tool

Roblox Tools

Roblox Game Pass Revenue Calculator

Calculate creator revenue from game pass price, expected sales, and fee assumptions before you set or change pricing.

Open tool

Roblox Tools

Roblox Group Commission Split Calculator

Plan Roblox commission payouts for collaborators with percentage or weighted shares and a clear rounded result for each person.

Open tool

Roblox Tools

Roblox Group Payout Percentage Calculator

Plan fixed-share Roblox group payouts with clear percentage inputs and exact plus rounded amounts for each member.

Open tool

Roblox Tools

Roblox Group Revenue Split Calculator

Compare equal, percentage, or weighted Roblox revenue splits and see a clean payout result for every teammate.

Open tool

Roblox Tools

Roblox Lua Table Formatter

Format messy Roblox Lua tables into cleaner, more readable output before you paste them back into Studio.

Open tool

Roblox Tools

Roblox Luau Formatter

Clean up common Roblox Luau snippets with predictable indentation and safer copy-paste output for Studio workflows.

Open tool

Roblox Tools

Roblox Marketplace Fee Calculator

Check what a Roblox marketplace listing is likely to return after deductions before you choose a final price.

Open tool

Roblox Tools

Roblox Price After Tax Calculator

Find the Roblox list price you need when the important number is the Robux you keep after fees, not just the player-facing price.

Open tool

Roblox Tools

Roblox Robux to USD Converter

Turn a Robux amount into a clearer USD creator-value estimate using transparent payout assumptions in the browser.

Open tool

Roblox Tools

Roblox Studio Color3 Converter

Convert HEX, RGB, normalized values, and Color3 snippets into Roblox Studio-ready color output with a live preview.

Open tool

Roblox Tools

Roblox Subscription Revenue Calculator

Model subscription revenue from your own price, subscriber counts, and fee assumptions before you change an offer.

Open tool

Roblox Tools

Roblox Tax Calculator

Estimate the Robux you keep after a sale, or work backward from a target net amount before you set pricing.

Open tool

Roblox Tools

Roblox UGC Revenue Calculator

Estimate Roblox UGC creator revenue from item price or gross Robux and compare likely net outcomes before you publish.

Open tool

Roblox Tools

Roblox USD to Robux Calculator

Start with a USD target and estimate the Robux it represents under transparent creator payout assumptions.

Open tool

Roblox Tools

Roblox Username Formatter and Cleaner

Take rough Roblox username ideas, strip obvious formatting problems, and compare practical draft variants without pretending to check availability.

Open tool

Roblox Tools

Roblox Username Rules Checker

Check whether a Roblox username idea looks structurally valid, count the characters, and generate a cleaner local variant without querying live availability.

Open tool

Web Utilities & SEO Tools

Robots.txt Auditor

Check crawler access, matched groups, and winning rules for a URL before you publish robots.txt updates.

Open tool

Web Utilities & SEO Tools

Robots.txt Tester

Check how a specific bot will read your robots.txt rules for any path before you ship a crawl-control change.

Open tool

Finance Calculators

Salary After Tax Estimator

Estimate monthly and annual take-home pay from gross salary, taxes, and deductions before you compare budgets or offers.

Open tool

Math & Science Tools

Scientific Calculator

Work through formulas with trig, logs, powers, roots, constants, and angle-mode switching without leaving the browser.

Open tool

Browser Tests & Diagnostics

What Is My Screen Resolution?

See your screen resolution, viewport, DPR, zoom, and responsive breakpoints instantly in a browser-based tool built for QA, design, and debugging.

Open tool

SEO & Marketing

SEO Meta Tag Generator

Create title tags, meta descriptions, canonicals, Open Graph tags, and starter schema in one browser-based workflow before launch.

Open tool

SEO & Marketing

SERP Snippet Preview Tool

Preview how your title tag, meta description, URL, and date may look in Google results before launch.

Open tool

Web Utilities & SEO Tools

Sitemap Validator

Validate sitemap XML, URL hygiene, and crawl-readiness before you ship a new sitemap.

Open tool

Lifestyle & Health Tools

Sleep Cycle Calculator

Plan bedtimes and wake-up times with cycle-based timing and a sleep-onset buffer before the next alarm.

Open tool

SEO & Marketing

Social Media Resizer

Resize one upload for common social posts, stories, ads, and banners without leaving the browser.

Open tool

Math & Science Tools

Statistics Calculator

Run descriptive statistics, percentile analysis, and outlier checks on numeric datasets.

Open tool

Lifestyle & Health Tools

TDEE Macro Calculator

Estimate maintenance calories and macro targets with Mifflin-St Jeor and activity multipliers before you plan your next phase.

Open tool

Productivity Tools

Text Transformation Tool

Convert casing, build slugs, and clean copied text with regex and line tools.

Open tool

Productivity Tools

Text Word Counter

Measure word count, character count, sentence count, reading time, and repeated terms in one live browser-based text check.

Open tool

Construction Material Calculators

Tile Calculator

Estimate floor and wall tiles from room dimensions, tile size, pattern waste, box counts, adhesive, grout, weight, and project cost.

Open tool

Productivity Tools

Time Duration Calculator

Measure elapsed time between two points, handle overnight ranges, and see gross and net duration at once.

Open tool

Online Developer Tools & Utilities

Timestamp Converter: Unix, ISO and Local

Translate between Unix seconds, Unix milliseconds, UTC, and local date-time formats without leaving the browser.

Open tool

Productivity Tools

Time Zone Converter

Compare the same instant across major IANA time zones, check UTC offsets, and catch DST or day-shift issues before you send invites.

Open tool

Browser Tests & Diagnostics

Typing Speed Test: WPM, Accuracy and Drills

Measure real typing speed with net WPM, accuracy, custom text, weakness drills, and local history in a mobile-friendly benchmark workflow.

Open tool

Math & Science Tools

Unit Conversion Lab

Convert single or batch values with factors, uncertainty bands, and summary statistics.

Open tool

Online Developer Tools & Utilities

URL Encoder and Decoder: Percent Encoding

Switch between encoding and decoding, choose component-safe mode, and inspect the converted URL text before reuse.

Open tool

SEO & Marketing

UTM Campaign Builder

Build clean campaign URLs in bulk, review tracking consistency, and export links with fewer naming mistakes.

Open tool

SEO & Marketing

UTM Link Generator

Create clean trackable campaign links, normalize UTM tokens, and copy the final URL or query string in one click.

Open tool

Online Developer Tools & Utilities

UUID Generator: v4, v1 and Bulk

Create random UUID v4 values in standard, uppercase, compact, or brace-wrapped formats without leaving the browser.

Open tool

Finance Calculators

VAT Calculator

Add or remove VAT instantly with country-specific tax rates or a custom rate.

Open tool

Construction Material Calculators

Wallpaper Calculator

Estimate wallpaper rolls, strip counts, waste, and cost in one live mobile-friendly workflow.

Open tool

Web Utilities & SEO Tools

Website Performance Simulator

Estimate an overall performance score from core web metrics.

Open tool

Productivity Tools

Week Number Calculator

Find the week number for any date and compare ISO and US week systems without doing calendar math by hand.

Open tool

Productivity Tools

Work Session Utility Planner

Break a work block into realistic focus sessions and breaks.

Open tool

Productivity Tools

Working Days Calculator

Measure business days between dates, remove weekends and holidays, and turn the result into practical working-hour estimates.

Open tool

Free Gaming Tools & Calculators

Gamer Reaction Speed Test

Optimized for gaming intent. Are your reflexes fast enough for competitive play?

Open tool

Free Gaming Tools & Calculators

CS2 Sensitivity Converter

Convert your Counter-Strike 2 sensitivity into VALORANT, Fortnite, Apex, and other shooters while preserving physical mouse feel.

Open tool

Free Gaming Tools & Calculators

VALORANT Sensitivity Converter

Convert your VALORANT sensitivity into CS2, Fortnite, Apex, and other shooters while keeping the same physical aiming baseline.

Open tool

Free Gaming Tools & Calculators

Fortnite Sensitivity Converter

Convert your Fortnite sensitivity into VALORANT, CS2, Apex, and other shooters while keeping physical mouse feel consistent.

Open tool

Free Gaming Tools & Calculators

Monitor Refresh Calculator

Check monitor refresh rate, frame budget, response-time utilization, and overshoot risk together instead of treating Hz as an isolated number.

Open tool

Finance Calculators

Mortgage Calculator

Estimate principal-and-interest mortgage payments, total borrowing cost, and payoff timing from loan amount, rate, and term.

Open tool

Finance Calculators

Loan Payment Calculator

Calculate monthly loan payment, total interest cost, and payoff timing for personal loans, auto loans, and other amortizing debt.

Open tool

Finance Calculators

Net Salary Calculator

Estimate annual and monthly take-home pay from gross salary, tax assumptions, and deduction rates in one net salary calculator.

Open tool

Math & Science Tools

Unit Converter

Convert common measurement units quickly across length, mass, temperature, speed, area, volume, and digital storage.

Open tool

Math & Science Tools

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin with clear formulas, batch support, and absolute-zero protection.

Open tool

Math & Science Tools

Bytes Converter

Convert between bytes, decimal storage units, and binary storage units without mixing up KB versus KiB or GB versus GiB.

Open tool

Math & Science Tools

Data Size Converter

Convert between decimal and binary data size units and check multiple values before you compare storage or transfer limits.

Open tool

Math & Science Tools

Speed Converter

Convert speed between road, aviation, and technical units with batch values for quick comparisons.

Open tool

Math & Science Tools

Weight Converter

Convert weight and mass between metric and imperial units with batch values for faster comparisons.

Open tool

Math & Science Tools

Length Converter

Convert length and distance between metric and imperial units with batch values for fast everyday or technical checks.

Open tool

Math & Science Tools

Volume Converter

Convert volume between kitchen, metric, and US units with batch values for quick cooking or measurement checks.

Open tool

Math & Science Tools

Energy Converter

Convert between joules, calories, kilowatt-hours, BTU, electron volts, and more with batch values for quick checks.

Open tool

Productivity Tools

Date Difference Calculator

Measure the gap between two dates, check the signed difference, and compare calendar days with workday context.

Open tool

Online Developer Tools & Utilities

JSON Diff Tool

Compare two JSON documents, isolate changed paths quickly, and review structural differences without manually scanning formatted blocks.

Open tool

Online Developer Tools & Utilities

JSON Minifier

Turn formatted JSON into compact output fast, keep the payload local, and confirm it still parses before you copy or export it.

Open tool

Online Developer Tools & Utilities

JSON Schema Validator

Check a JSON payload against a schema, surface failing paths quickly, and keep contract checks local while you iterate.

Open tool

Online Developer Tools & Utilities

JSON to XML Converter

Convert JSON into XML markup, choose sensible root and item tags, and keep the whole transformation inside your browser.

Open tool

Online Developer Tools & Utilities

Regex Generator

Generate JavaScript regex starters for common validation and search patterns, then test them against sample input locally.

Open tool

Online Developer Tools & Utilities

Regex Cheat Sheet

Browse common JavaScript regex tokens, group types, flags, and examples without leaving the browser.

Open tool

Online Developer Tools & Utilities

Regex Replace Tool

Apply JavaScript regex replacements locally, inspect which matches were changed, and keep source text out of external services.

Open tool

Online Developer Tools & Utilities

Regex Explain Tool

Break a JavaScript regex into readable parts, inspect group and quantifier structure, and preview the pattern on sample text locally.

Open tool

Finance Calculators

Savings Calculator

Project how a starting balance and regular monthly contributions grow with compound interest over any time horizon.

Open tool

Finance Calculators

Retirement Calculator

Project your retirement savings balance from a current portfolio, monthly contributions, expected return, and inflation rate.

Open tool

Finance Calculators

Reverse VAT Calculator

Find the pre-VAT net price from a VAT-inclusive gross amount for any country or custom rate.

Open tool

Finance Calculators

Markup Calculator

Calculate markup percentage and profit margin from cost and selling price, and understand the key difference between the two.

Open tool

Finance Calculators

Purchasing Power Calculator

See how inflation erodes the real purchasing power of a fixed sum of money over time, in both forward and backward directions.

Open tool

Finance Calculators

Break-Even Point Calculator

Find the exact number of units to sell to cover all fixed and variable costs, in both unit volume and revenue threshold.

Open tool

Free Gaming Tools & Calculators

Apex Legends Sensitivity Converter

Convert your Apex Legends sensitivity to CS2, Valorant, Fortnite, or another shooter by matching physical cm/360 turn distance.

Open tool

Free Gaming Tools & Calculators

Overwatch Sensitivity Converter

Convert your Overwatch 2 sensitivity to CS2, Valorant, or Apex Legends by matching physical cm/360 turn distance exactly.

Open tool

Free Gaming Tools & Calculators

Rainbow Six Siege Sensitivity Converter

Convert your Rainbow Six Siege sensitivity to CS2, Valorant, or Apex Legends using exact cm/360 matching and R6's unique yaw scale.

Open tool