Format JSON, encode Base64, minify HTML, and preview Markdown — all in your browser.
Format, validate and minify JSON with clear errors, one-click repair, exact big numbers and a tree view.
Encode or decode text, or convert any file to/from Base64.
Shrink HTML for production, or pretty-print it for reading.
Write Markdown and see it rendered live, with GFM tables & task lists.
Test a regular expression live, with match highlighting and groups.
Shrink CSS for production, or pretty-print it for reading.
Encode or decode a URL or query parameter, correctly.
Build or explain a cron expression, with next run times.
Generate UUID v4/v7, ULID, or NanoID — single or in bulk.
MD5, SHA-1, SHA-256, SHA-512 for text or a file checksum.
Convert between Unix time, ISO 8601, UTC, and relative time.
IP + CIDR to network, broadcast, and usable host range.
Decode a JWT with expiry status, a security audit, and code snippets.
Beautify or minify SQL, with keyword capitalization.
Turn a curl command into JS, Python, PHP, Go, or Ruby code.
Build and send a real request, with response inspection.
Check format, catch typos, and flag disposable domains.
Look up A, AAAA, MX, TXT, NS, and CNAME records for a domain.
Combine .gitignore templates for any stack — Node, Python, Unity & more.
Build a valid package.json visually, with a live preview.
Searchable Git cheatsheet, plus a "what do I need to do X" lookup.
Paste an SVG, get a ready-to-use React or Vue component.
Shrink SVG file size with adjustable aggressiveness, visually verified.
Build a README.md with badges, from a guided form with live preview.
Generate a docker-compose.yml or an Nginx reverse-proxy config.
Small utilities that come up constantly while building or debugging something — cleaning up an API response, encoding a file for an embed, shrinking an HTML file before shipping it, or checking how a README will actually render. Each tool here is built for that exact moment: paste something in, get a usable result immediately, with no upload step and no waiting on a server round-trip.
No — every one of these tools runs entirely in your browser using standard Web APIs. Nothing you paste or upload here ever leaves your device, which also means there's no file size limit imposed by an upload step.
Yes — since processing happens locally in your browser and nothing is transmitted anywhere, these tools are safe to use with data you wouldn't want to paste into a random third-party web service.
Not necessarily — editor extensions are convenient when you're already in your IDE, but these tools are useful for a quick one-off check, sharing a link with a teammate, or working from a machine that doesn't have your usual setup installed.
Yes, completely free, with no sign-up and no usage limits.
