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cleantools.co
Index of 59 tools · updated 2026-09-26

Small tools.
Sharp edges.
No sign-up.

Counters, converters, calculators and generators that open instantly and run entirely on your device. Nothing you paste or drop here is uploaded.

59Tools
0Accounts
0 KBUploaded
25Just added
Instant answer

Text

Count, clean, convert and compare words.
T-001Text
Word Counter Words, characters, sentences and reading time as you type.
T-002New
Text Cleaner Strip extra spaces, line breaks, duplicates and junk characters.
T-003Text
Case Converter UPPER, lower, Title, Sentence, camel, snake and kebab.
T-004Text
Diff Checker Compare two texts and see every added and removed line.
T-005Text
Lorem Ipsum Placeholder paragraphs, sentences or words on demand.
T-006Text
Slug Generator Turn any title into a clean, URL-friendly slug.
T-007Text
Markdown Preview Write Markdown, see it rendered live, copy the HTML.
T-008New
Number to Words Spell out numbers in words — for cheques and contracts.

Developer

Encoders, formatters and inspectors for code people.
T-009Developer
JSON Formatter Format, validate, minify and explore JSON.
T-010Developer
Base64 Encode and decode Base64 text and files.
T-011Developer
URL Encoder Percent-encode or decode URLs and query strings.
T-012Developer
JWT Decoder Inspect a JSON Web Token’s header, payload and expiry.
T-013Developer
Regex Tester Test regular expressions with live match highlighting.
T-014Developer
Hash Generator MD5, SHA-1, SHA-256 and SHA-512 of text or files, plus HMAC.
T-015Developer
Timestamp Converter Unix epoch to human date and back, in any zone.
T-016Developer
Number Base Converter Decimal, hex, binary and octal in one place.
T-017Developer
Binary Translator Text to binary and binary back to text.
T-018New
CSV ⇄ JSON Convert CSV to JSON and JSON to CSV, with a table preview.
T-019New
YAML ⇄ JSON Translate YAML to JSON and back, with error lines.
T-020New
Cron Explainer Read a cron expression in plain English with next run times.
T-021New
HTML Entities Escape and unescape HTML entities safely.
T-022New
PX ⇄ REM Convert pixels to rem/em with a custom base size.

Design & Color

Color, contrast, gradients and proportions.
T-023Design
Color Picker Pick a color and get HEX, RGB, HSL and OKLCH.
T-024New
Contrast Checker WCAG contrast ratio for text and UI, with fixes.
T-025New
Palette Generator Harmonious palettes and tint scales from one color.
T-026New
Gradient Generator Build linear, radial and conic CSS gradients visually.
T-027Design
Aspect Ratio Find ratios and scale dimensions proportionally.

Images & Files

Convert, resize, strip and merge — locally.
T-028Images
Image Converter PNG, JPEG, WebP and AVIF — converted in your browser.
T-029New
Image Resizer Resize and compress photos in bulk, then download a zip.
T-030New
Photo Metadata Remover See and strip GPS, camera and EXIF data from photos.
T-031New
PDF Merge & Split Combine, reorder and split PDFs without uploading them.
T-032New
Favicon Generator Favicons and app icons from an image, emoji or letter.

Calculators

Everyday math, dates and measurements.
T-033Calculators
Percentage Calculator Percent of, percent change and what-percent questions.
T-034Calculators
Unit Converter Length, weight, temperature, volume, speed and more.
T-035Calculators
Date Calculator Days between dates, or add and subtract time.
T-036New
Age Calculator Exact age in years, months and days — plus next birthday.
T-037New
Time Zone Converter Compare times across cities and find a meeting slot.
T-038New
BMI Calculator Body mass index in metric or imperial, with ranges.
T-039New
Roman Numerals Convert numbers to Roman numerals and back.
T-040New
Timer & Stopwatch Countdown, stopwatch with laps, and a Pomodoro cycle.

Money

Interest, loans, tax and pay.
T-041Money
Compound Interest Growth with contributions, charted year by year.
T-042Money
Loan & Mortgage Monthly payment, total interest and amortization.
T-043Money
Drawdown Calculator How long a portfolio lasts under withdrawals.
T-044Money
Income Tax Estimator Estimate US federal income tax and take-home pay.
T-045New
Salary Converter Hourly, weekly, monthly and yearly pay side by side.
T-046New
Tip & Split Tip, tax and an even split for the whole table.
T-047New
Discount Calculator Sale price, savings and stacked discounts.

Generators

Passwords, IDs, QR codes and random things.
T-048Generators
Password Generator Strong passwords and memorable passphrases.
T-049Generators
QR Code Generator QR codes for links, Wi-Fi, text and contacts.
T-050Generators
UUID Generator v4 and v7 UUIDs in bulk.
T-051Generators
Username Generator Random usernames and handles for any platform.
T-052Generators
Random Number Random integers or decimals in any range.

Fun

Memes, pixels, typing races and chance.
T-053Fun
Meme Generator Drop in an image and add classic meme text.
T-054New
Wheel Spinner Spin a wheel of names to pick a winner fairly.
T-055New
Dice & Coin Roll any dice (2d6, d20…) or flip a coin.
T-056New
Typing Test Measure your words per minute and accuracy.
T-057Fun
Pixel Art Editor Draw on a pixel grid and export a crisp PNG.
T-058Fun
ASCII Art Turn any image into ASCII text art.
T-059Fun
Emoji Kitchen Mash two emoji together into a brand-new sticker.
01 — Local

Your data stays put.

Every tool runs in JavaScript on your device. Images, PDFs and text are processed in memory and never sent to a server.

02 — Instant

Open, use, leave.

No accounts, no paywalls, no “download our app”. Each page is a single static file that loads fast even on bad Wi-Fi.

03 — Keyboard

Press ⌘K anywhere.

Jump to any tool from any page. The box up top also answers quick questions: math, conversions, colors, dates.