Developer Tools
Format, validate, encode and generate data directly in your browser. Every listed tool is free to use without registration.
7 tools
JSON Formatter
Format, validate and beautify JSON with configurable indentation and instant errors.
Base64 Encoder / Decoder
Encode or decode UTF-8 text locally with clear validation and one-click copy.
UUID Generator
Generate up to 100 cryptographically random UUID v4 identifiers.
JSON Validator
Check JSON syntax and locate errors without uploading your data.
JSON Minifier
Compress valid JSON and compare original and minified file sizes.
URL Encoder / Decoder
Safely encode URL components or full URLs and decode percent-encoded text.
Unix Timestamp Converter
Convert Unix seconds or milliseconds to local, UTC and ISO dates.
About Developer Tools
These utilities help inspect, transform and generate common development data. Text inputs are processed locally in your browser and are not included in analytics.
Do I need an account?
No. AIOOS tools are available without registration.
Is my input uploaded?
Browser-based tool inputs are processed locally. We collect generic usage events, never the contents entered into a tool.