developer utility desk
Stop opening a new tab for every tiny tool.
NestTools puts the daily utilities in one fast workspace: JSON, JWT, UUID, regex, timestamps, text cleanup, AI checks, and color conversion. No account, no upload, no context switching.
Data
Data tools
JSON Formatter & Validator
Format, validate, and beautify JSON data instantly
JSON ↔ CSV Converter
Convert between JSON arrays and CSV format
UUID Generator (v4)
Generate random UUIDs (v4) instantly
UUID v7 Generator
Generate time-ordered UUID v7 (RFC 9562)
Unix Timestamp Converter
Convert epoch timestamps to human-readable dates
Encoding
Encoding tools
Text
Text tools
Security
Security tools
Dev
Dev tools
Design
Design tools
No tool matched that search. Try “JSON”, “JWT”, “regex”, “word”, or “timestamp”.
private
No server round-trips for your input.
The core converters, counters, encoders, and formatters execute in the browser, so sensitive snippets stay on your machine.
fast
Built for repeat use, not browsing.
The homepage acts like a command center: search once, launch the utility, copy the result, move on.
practical
Developer tools plus writing tools.
It covers code cleanup, content checks, placeholder generation, text case conversion, and design color conversion in one place.