ten tools · zero uploads
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Free developer tools that run entirely in your browser. No sign-up, no server, no waiting. Start with the one below, then take the other nine.
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The Full Set
● All Ten Live
Base64 Encoder & Decoder
Encode text or files to Base64 and decode straight back. Handles UTF-8, data URIs, and URL-safe variants.
UUID Generator
Generate v4 and v7 UUIDs one at a time or a thousand at once. Copy the whole batch in one click.
JSON Formatter & Validator
Pretty-print, minify, and validate. Syntax errors are reported with the exact line and column.
Timestamp Converter
Unix seconds or milliseconds to readable dates, in any timezone, with the reverse direction too.
JWT Decoder
Read the header, payload, and expiry of any token. The token never leaves this tab.
Markdown to HTML
Live preview with GitHub-flavored tables, fenced code, and task lists. Copy clean HTML out.
YAML and JSON Converter
Convert either direction. Anchors, multi-line strings, and nested maps survive the trip.
Cron Expression Parser
Turn five cryptic fields into plain English, plus the next five times the job will actually run.
Hash Generator
SHA-256, SHA-512, and MD5 digests from text or a dropped file, computed with the Web Crypto API.
CSS Minifier
Strip comments and whitespace, collapse rules, and see exactly how many bytes you saved.
Something missing?
Tell us which tool you keep googling and it goes on the build list.
Nothing is uploaded
Every tool runs in your browser with the Web Crypto and Encoding APIs. Open the Network tab and watch nothing happen.
One tool, One page
No dashboard, no account, no modal asking for your email. The URL you land on is the tool, already focused.
Loads before you blink
Static pages on a CDN, no framework waterfall, no ad script blocking the input. Under a second, every time.