Developer and designer tools
Format, decode, convert and compare. Pick a section below.
Developer Tools
Format, decode and inspect the data formats developers deal with daily: JSON, Base64, JWT, regex, hashes, cron and timestamps. Nothing is uploaded.
Color Tools
Convert between color spaces, check WCAG contrast and build palettes. Built on OKLCH, the same color space this site is styled in.
Image Tools
Compress, resize and convert images between WebP, AVIF, PNG and JPEG. Every file is processed on your own device and never uploaded.
CSS Tools
Generate CSS you can paste straight into a stylesheet, with a live preview and a Tailwind v4 form of every result. Ten generators, no dependencies.
Text Tools
Count words, sort and deduplicate lines, strip whitespace and number lines. Nothing you paste ever leaves your browser.
Everything runs in your browser
Every tool here does its work in the tab you already have open. Text you paste is handled by JavaScript on your own machine, files are read with the browser's File API, and hashes come from Web Crypto, the browser's own cryptography implementation. There is no upload step, because there is no server to upload to.
You can check that instead of taking it on trust. Open your browser's network panel and watch while you work, or disconnect after the page has loaded and keep going. Nothing breaks.
What is here
51 tools so far, in three groups. Developer tools cover the formats that turn up in a terminal or a log file: JSON with the line and column of the first error, JWT claims in a readable table, cron expressions in plain English with their next ten run times. Text tools do the list work, from sorting and deduplicating to finding whitespace you cannot see. CSS tools build shadows against a live preview and hand back a value you can paste.
Color and image tools are next.
No account, no upload, no paid tier
Nothing here asks you to sign in, and no part of a tool is held back for a subscription. The site is free because it costs almost nothing to run: it is static files on a CDN, and the work happens on your machine rather than on a server somebody has to pay for.
More on why it exists and who builds it, or on what it collects, which is close to nothing.