Fast, free, browser-based tools for developers. Bookmark this. You'll be back.
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Format, validate, and beautify JSON instantly. Supports minify, sort keys, and syntax highlighting.
Encode text or files to Base64 and decode Base64 strings back to plain text or binary.
Generate v1, v4, and v5 UUIDs in bulk. Copy individually or export all at once.
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for any text string instantly.
Encode and decode URLs and query parameters. Supports full URL and component encoding.
Interchange JSON array datasets directly into clean tabular CSV columns, and vice-versa.
Generate cron schedule syntax visually, or decode confusing cron expressions into plain text.
Compress HTML markup and CSS style structures to accelerate page load times.
Parse Unix epoch seconds and milliseconds to human-readable date formats, and vice-versa.
Parse JSON Web Tokens (JWT) safely. Decode and inspect header, claims payload, and signature.
Every tool on this site runs entirely in JavaScript on your device. We do not log, store, or transmit any input you paste or type. There is no backend. There is no database. There is no tracking beyond basic anonymous page view analytics.
I run this site out of pocket to keep it ad-free and privacy-first. The free tier has soft rate limits to save server capacity. Support the project and unlock unlimited operations instantly.
Complete ad-free, rate-limit free access to all 10 tools for 24 hours. Perfect for one-off dev tasks.
Unlimited ad-free utility access for a full month. Best choice for developers working on ongoing sprints.
One-time payment. Permanent, unlimited, ad-free access to all current and future tools forever.