Changelog

Convert HEX, RGB, HSL and OKLCH in any direction as you type, with 8-digit alpha support and a live swatch — every conversion runs in your own browser.

Pick a color from any image in your browser, or straight off the screen where your browser allows it — with the value in four formats and a palette you keep.

Combine PDF files into one document in your browser. Reorder the pages before you merge — nothing is uploaded and no sign-up is asked for.

Split a PDF into separate files by page range, in your browser. Extract just the pages you need — nothing is uploaded and no sign-up is asked for.

Convert PDF to JPG or PNG in your browser, one image per page at screen, normal or print resolution. The PDF never leaves your device.

Convert JPG to PDF in your browser — combine several images into one file at A4, Letter or a page sized to match each. The images are never uploaded.

Test your webcam with a live preview in the browser, and see the resolution and frame rate your camera is really sending. Nothing is uploaded.

Convert text to UPPERCASE, lowercase, Title Case or Sentence case, and to camelCase, snake_case or kebab-case for code — instantly, in your browser.

Compare two blocks of text line by line and see exactly what was added, removed or changed — the comparison runs on your own device.

A plain text notepad in your browser tab that saves as you type and is still there after a reload, with word counts and a .txt download.

Convert Unix epoch timestamps to dates and back in seconds or milliseconds, with UTC and your local time side by side, and Discord markup as output.

Generate Code 128, EAN-13, UPC-A and Code 39 barcodes in your browser. Check digits are worked out for you, and every barcode downloads as PNG or SVG.

Draw a signature with your mouse or finger, or type one in a handwriting font, then save it as a transparent PNG or SVG. Nothing is stored.

Paste text and hear it read aloud — no sign-up, no character limit. The voice picker marks which voices run on your device and which send text to a server.

Convert a text-based bank statement PDF to CSV in your browser. Scanned statements are refused, not guessed at; only your saved column layout is uploaded.

Convert YAML to JSON in your browser — paste a config or drop a .yaml or .yml file, and the parsing happens on your device, not on a server.

Shipped with 1 variants: JSON to YAML Converter.

Enter a date of birth and get an exact age in years, months and days, the total days and weeks lived, and how long there is until the next birthday.

Cycle full-screen colours to find dead or stuck pixels on any monitor, laptop screen or phone display, with no app install required.

Measure your reaction time over five rounds and compare your average against typical human reaction speeds — no download, no account, just your browser.

Count how many times you can hit the spacebar against the clock. The same clicks-per-second test, narrowed to a single key — no mouse, just the space bar.

Shipped with 4 variants: 5 Second Spacebar Counter, 10 Second Spacebar Counter, 30 Second Spacebar Counter, 60 Second Spacebar Counter.

Test your PS5, Xbox or USB controller in the browser — check every button, both sticks for drift, the analog triggers and the d-pad before you blame a game.

Shipped with 4 variants: PS5 Controller Test, Xbox Controller Test, PS4 Controller Test, Switch Pro Controller Test.

Check your microphone with a live waveform before a call or a stream. The audio is read live in your browser and isn't recorded or uploaded.

Free online stopwatch with lap and split times, accurate to the hundredth of a second, that keeps counting correctly if you switch tabs or lock your screen.

Count words, characters and reading time as you type, with limits for Twitter/X, Instagram bios and other platforms built in.

A 25-minute Pomodoro focus timer with automatic breaks, an alarm, and a running tally of completed sessions, no account needed.

Shipped with 2 variants: 25 Minute Timer, 50 Minute Timer.

Set a custom countdown to any length with an alarm at zero — from a one-minute egg timer to an hour-long study block you can bookmark.

Shipped with 9 variants: 1 Minute Timer, 3 Minute Timer, 5 Minute Timer, 10 Minute Timer, 15 Minute Timer, 20 Minute Timer, 30 Minute Timer, 45 Minute Timer, 60 Minute Timer.

Encode and decode Base64 text and files instantly, entirely client-side, with no upload and no size limit imposed by a server.

Format, validate and beautify JSON in the browser with inline error locations — what you paste is parsed on your own device rather than sent to a server.

Generate strong random passwords or memorable passphrases with adjustable length, character sets and an entropy estimate, computed only in your browser.

Generate random v4 UUIDs and GUIDs in bulk, copyable individually or as a list, computed locally in your browser with no server round-trip for a single one.

Turn text, links or Wi-Fi details into a downloadable QR code, generated in your browser with no sign-up and no watermark.

Convert images between JPG, PNG and WebP entirely in your browser, with no upload — pick a quality, a background color, and download the result.

Shipped with 5 variants: JPG to PNG Converter, PNG to JPG Converter, WebP to JPG Converter, PNG to WebP Converter, JPG to WebP Converter.

Test every key on a Chinese keyboard and check your Pinyin or Zhuyin input method really produces characters. Covers Bopomofo caps and all five board sizes.

Test a Hindi keyboard in your browser. Check every switch, confirm an InScript layout is applied, and see whether Devanagari really reaches the box.

Test an Arabic keyboard in your browser. Check every switch, confirm the Arabic layout is live, and see whether letters join and run right to left.

Test a Russian ЙЦУКЕН keyboard in your browser. Check every switch, confirm the Cyrillic layout is live, and find keys producing the wrong letter.

Work out what Etsy really takes from a sale: listing, transaction, payment processing and Offsite Ads fees, plus your payout, profit and margin.

Work out eBay's final value fee, per-order fee and your real profit on a US sale — including the fee eBay charges on the shipping you collected.

Work out Amazon US referral and FBA fulfillment fees from your price, box size and weight, then see the size tier, net proceeds and profit margin.

Work out PayPal's US fee on any payment, then reverse it to find what to charge so the amount you need actually lands in your account.

Test mouse buttons, scroll wheel, double-click speed and polling rate in the browser before you blame a bad match on your hardware.

Test every key on your keyboard in the browser. See which switches register, catch ghosting, check 100%, 80%, 75%, 65% and 60% boards in ANSI, ISO or AZERTY.

Measure your clicks per second in the browser. Pick a duration from one to a hundred seconds and see exactly how your click speed compares.

Shipped with 5 variants: 1 Second CPS Test, 5 Second CPS Test, 10 Second CPS Test, 60 Second CPS Test, 100 Second CPS Test.