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InstantTools

Utilities Tools

The everything-else drawer, done properly: developer utilities (JSON, JWT, SQL, regex, hashes, cron), financial calculators (mortgage, salary, compound interest, retirement), color and design tools, timers and world clocks, and a few genuinely good games. Fifty-plus single-purpose tools, each one loading instantly and running locally.

Developer & data

Format, decode, and check the strings developers paste around all day.

JSON Formatter
Beautify, minify, and validate JSON data instantly.
JWT Decoder
Decode and inspect JSON Web Tokens entirely within your browser.
Regex Tester
Test a JavaScript regular expression against your own text. Every match highlights as you type, with its position, its numbered and named capture groups, and a live replacement preview.
SQL Formatter
Format and beautify SQL queries for 7 dialects — indentation, keyword casing, all in-browser.
CSV to JSON Converter
Convert raw CSV data into formatted JSON arrays instantly.
Cron Expression Parser
Decode any cron expression into plain English and preview its next run times.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files — locally.
CIDR / Subnet Calculator
Enter an IP and prefix (e.g. 192.168.1.0/24) and get the network address, broadcast, usable host range, masks, and binary breakdown — instantly, offline.

Design & color

Palettes, gradients, type scales, and the unit math between design and CSS.

Color Palette Generator
Turn one hex color into an 11-step tonal scale (50 to 950) and five harmony palettes. Click any swatch to copy its hex code, or copy the whole scale as CSS custom properties.
CSS Gradient Generator
Build linear and radial CSS gradients with as many color stops as you need, watch a live preview, and copy the finished background rule in one click.
HEX ↔ RGB Converter
Convert between HEX, RGB, RGBA, HSL, HSLA, and OKLCH color formats with a live swatch, alpha slider, and CSS-ready output.
PX to REM & Color Converter
Convert a pixel value to rem, em, pt, and % against any root font size, or turn a HEX, RGB, or HSL color into the other two formats with a live swatch. Every result updates as you type and has its own Copy button.
Typography Scale Generator
Generate a harmonious type scale from a base size and a musical ratio — with live preview and exportable CSS variables, including fluid clamp() values.
Aspect Ratio Calculator
Scale any width × height to new dimensions without distortion — with the simplified ratio, common presets, and a live shape preview.
SVG Optimizer
Clean up and minify SVG files for web use.

Money & work

Pay, rates, loans, and long-term savings, with the math shown.

Salary Calculator
Convert pay between hourly, weekly, monthly, and annual — adjusted for your real work schedule.
Hourly to Salary Calculator
Convert an hourly wage to its annual salary equivalent — with real hours and weeks, not assumptions.
Salary to Hourly Calculator
Break an annual salary down to its true hourly rate — adjusted for the hours you actually work.
Freelance Rate Calculator
Work out the hourly and day rate you actually need to charge — from your target income, real expenses, taxes, and the billable hours you truly have.
Mortgage Calculator
A mortgage calculator with the math showing. Every monthly payment is a row on a parchment ledger — PITI breakdown, full amortization schedule, extra-principal what-ifs, and a rate sensitivity strip that shows what a quarter point actually costs.
Loan Calculator
A loan calculator with the math showing. Auto, personal, or student — enter the amount, rate, and term, then optionally add extra principal to see what you’d save in interest and how many months you’d shave off.
Compound Interest Calculator
A compound interest calculator with the math showing. Project an investment forward with monthly contributions, watch the balance climb on an inline sparkline, audit every year in a parchment ledger, and flip the inflation toggle to read the final number in today’s dollars.
Retirement Calculator
A retirement calculator with the math showing. Project your nest egg to retirement, then see the safe annual income your portfolio can support — in today’s dollars — along with a year-by-year drawdown schedule that tells you exactly when the money runs out.
Rent vs Buy Calculator
A rent vs buy calculator that runs both paths side-by-side. Owning (mortgage + taxes + maintenance + appreciation − equity) and renting + investing the down payment (portfolio growth − capital gains). A clear break-even year — or the verdict that buying doesn’t beat renting at this horizon.

Time

Clocks across cities, meeting times across time zones, and timers for focus.

World Clock
A 3D globe-based observatory for tracking multiple time zones. View simultaneous times across continents, scrub through projected times, and explore temporal shifts across meridians.
Timezone Converter
A lockstep timezone converter for planning meetings across continents. Drag a cursor through the day and watch every participant's local time shift in unison. Working hours glow, nights fade — meeting windows become obvious without arithmetic.
Countdown Timer
A full-screen countdown built for launches, demos, and deep work. A gradient progress ring closes as the seconds tick, and a soft three-note chime marks touchdown. Keyboard-first controls, URL-shareable presets, and a quiet, chronos-palette canvas that stays out of your way.
Pomodoro Studio
A pomodoro that respects your focus. Three modes (focus / short break / long break) rotate through a cycle meter; ambient color shifts mark the transition and a gentle chime says "landed". No desktop notifications, no guilt trips — just a quiet session log and a pause key that actually works.

Maps, weather & units

Coordinates, distances, bearings, forecasts, and unit conversion.

Compass Weather
A current-conditions observatory with an animated hero gradient, hourly scroller, and 10-day outlook. Powered by Open-Meteo — free, global, no account required.
Compass Weather Radar
Animated precipitation radar across a dark editorial map. RainViewer tiles overlaid on MapLibre at 60% opacity, with a 2-hour history scrubber.
Distance Arc
Great-circle distance between any two cities, drawn as a cyan arc across a dark editorial map. Type two place names, see the precise distance in kilometers and miles, plus bearing and midpoint.
Coordinate Converter
Paste GPS coordinates in decimal degrees, degrees-minutes-seconds, UTM, or MGRS. It detects the format and shows all four at once, each with a copy button.
Compass Heading Calculator
Pick two places and get the true bearing to set off on, the bearing you arrive on, and the magnetic declination at your starting point from the World Magnetic Model. On a phone, the compass rose can also turn with your device's compass.
Unit Converter
Type a value with its unit, like 5 km, 98.6 f, or 32 psi, and see it in every other unit of that kind at once. Covers 53 units of length, area, volume, mass, temperature, pressure, and speed.

Games, chance & words

Dice, coins, random picks and the odds behind them, plus word puzzles and solvers.

Dice Roller
A 3D dice console for tabletop and decision-making. Roll d4–d100 with modifiers, advantage, disadvantage, and 4d6-drop-lowest presets — with a telemetry log that tracks your session.
Coin Flipper
Flip a coin online and get heads or tails with a 3D spin. A running tally, streak counter, and full flip history keep score, and a bias slider turns it into a weighted coin.
Random Number Generator
Pick random whole numbers from any range, up to 1,000 at a time. Turn on Unique values for no repeats, sort the list, or enter a seed to get the exact same draw again later.
Probability Calculator
Three calculators on one page: binomial odds for exactly, at most, and at least K successes in N trials; the full sum distribution for up to 10 dice with 2 to 100 sides; and nCr and nPr counts, with the formulas shown.
Word Unscrambler
Type up to 12 letters and see every English word you can spell with them, from a 270,000-word dictionary, longest first, each with its Scrabble tile score. Filter by minimum length, a must-contain chunk, or exact anagrams that use every letter.
Scrabble Score & Syllable Counter
Type a word and get its Scrabble tile score, an estimated syllable count, vowel and consonant counts, letter frequency, its reversal, and a palindrome check that ignores spaces and punctuation. Exact anagrams from a 270,000-word dictionary show underneath.
Center Letter Word Puzzle
Spell words from seven letters on a dial. Every word needs at least four letters and must include the center letter, and letters can repeat. Your score climbs a six-step rank ladder scaled to each puzzle's maximum.
Rubik’s Cube
A fully playable 3D Rubik’s Cube that runs entirely in your browser. Drag any sticker to turn that layer, drag empty space to orbit, scramble, and race the clock — with a move counter and best-time tracking.

Everyday

Strong passwords and QR codes, made on your device.

AI writing helpers

Drafts for meta descriptions, schema, alt text, and summaries. Some run a model in your browser; the ones labeled as cloud tools send your text to an AI provider for that request.

GEO / AI Visibility Checker
Score your content for AI search citability. Get dimension scores for answer structure, citation-worthiness, scannability, authority signals, and semantic clarity.
Schema Generator
Generate valid JSON-LD schema markup for Article, FAQ, Product, HowTo, LocalBusiness, Event, and Recipe. Instant, no account needed.
Meta Description Generator
Generate three click-worthy meta description variants, each optimised for the 145–160 character window that Google displays.
Alt Text Generator
Generate WCAG-compliant alt text in three length variants (short, medium, long) from any image. Drop an image, get copy-ready descriptions.
Title Tag Optimizer
Generate five title tag variants that fit Google's 60-character display window, with visual SERP indicator per result.
FAQ Generator
Generate PAA-ready question-and-answer pairs for any topic. Choose count (3–15), target audience, and copy all as Markdown.
AI Keyword Extractor
Extract the most relevant keywords from any text using TF-IDF analysis. Pure JavaScript, no model download required.
AI Schema Generator
Generate JSON-LD structured data (Article, Product, BreadcrumbList, FAQPage) from simple inputs. Template-based, no AI model needed.
AI Text Summarizer
Summarize long text into 2–4 concise sentences using a local AI model that runs entirely in your browser. First use downloads a ~100 MB model; subsequent uses are instant.
AI Meta Description Generator
Generate an SEO-optimized meta description (≤155 characters) from any content using a local AI model. Runs in-browser, no data sent anywhere.

Which Utilities Tool Do I Need?

Debug structured dataJSON Formatter →

Format or minify JSON — and its neighbors decode JWTs, convert CSV to JSON, and format SQL. Safe for tokens and production data precisely because nothing is transmitted.

Generate credentials and codesPassword Generator →

Cryptographically random passwords to your length/symbol spec, generated on-device. The QR Code Generator does the same for links and Wi-Fi credentials.

Run the numbers on a big decisionMortgage Calculator →

Principal, rate, taxes, insurance — plus siblings for loans, compound interest, retirement, rent-vs-buy, and salary conversions.

Understand a cron scheduleCron Expression Parser →

Translates expressions like */15 9-17 * * 1-5 into plain English and shows the next five run times.

Work with color like a designerColor Forge →

Tonal scales, harmony palettes, and exportable CSS tokens — with HEX↔RGB conversion and a gradient studio alongside.

Coordinate across time zonesWorld Clock →

Cities orbiting a real 3D globe, plus a timezone converter and countdown timers.

Why These Tools Run in Your Browser

Developer utilities are the classic case for local processing: the things developers paste — JWTs, connection strings, API responses, customer data in a CSV — are exactly the things that should never be pasted into a random website that processes them server-side. Every utility here computes in your tab. The financial calculators share the same property: your income, mortgage numbers, and retirement plans are inputs to a formula on your device, not a lead-generation form.

Don’t take the privacy claim on faith — we published a network-level verification in the Privacy Audit and measured processing speed in the Speed Benchmark.

Frequently Asked Questions

Is it safe to paste a production JWT or API response here?

That's the design goal: decoding and formatting happen in your browser's memory with zero network transmission, which you can verify live in the network tab. We published exactly that verification — pasting a token and diffing the request log — in our Privacy Audit.

How accurate are the financial calculators?

They implement the standard formulas (amortization, compound interest, future value) and show their work — the mortgage calculator breaks out principal, interest, taxes, and insurance line by line. They're planning tools, not financial advice; lender quotes will differ by fees and rate specifics.

Are the passwords from the generator really random?

They're generated with the Web Crypto API (crypto.getRandomValues), the browser's cryptographically secure source — not Math.random(). Generation happens on your device, and no generated password is ever transmitted or stored.

Why are there games in a utilities collection?

Because a five-minute brain break beats a doomscroll. The word games (Alchemist, Scholar, The Voyager) and the dice roller follow the same rules as everything else: no account, no upload, instant load.