Loona All 8 Developer Tools
JSON Formatter
Validate, pretty-print and minify JSON, with the exact position of any error.
Base64 Encoder & Decoder
Encode text and files to Base64, or decode it back - UTF-8 safe, URL-safe option included.
URL Encoder & Decoder
Percent-encode text and URLs safely, with a per-character breakdown table.
UUID Generator
Generate random version 4 UUIDs - one at a time or in bulk up to 100.
Hash Generator
SHA-1, SHA-256, SHA-384 and SHA-512 digests of any text, computed in your browser.
JWT Decoder
Decode a JSON Web Token header and payload and read its expiry in plain words.
Timestamp Converter
Convert Unix timestamps to human dates and back - UTC, your local time and relative time.
HTML Entity Encoder
Escape text into HTML entities (named or numbered) and decode entities back to text.
Popular Developer Tools
How Loona Developer Tools Work
- Open any tool and paste, type or load your data - there is nothing to install and nothing to sign up for.
- The tool does its work instantly, using JavaScript running inside your own browser.
- Copy or download the result. Your input is never uploaded, never stored and never seen by us.
Why developers use these tools
Debugging an API response, checking a token before a meeting, hashing a test string, converting a timestamp from a log file - these are small jobs that happen ten times a day. Loona Developer Tools keeps them all in one fast place, with no ads-in-your-face popups, no "pro" paywall and no server ever touching your data. Sensitive payloads, tokens and keys stay on your machine, which is exactly where they belong.
Part of the Loona family
Loona Developer Tools is one of the free tool sites from Loona Automation - alongside text tools, calculators, PDF tools, image tools, audio tools and more. Every site follows the same rules: free, no sign-up, and your data stays on your device.