About Dev Tools
Purpose
Dev Tools was built so that anyone can handle the small tasks you hit constantly while coding and debugging — easily and safely. With no complex IDE extension and no separate sign-up, with no cost to worry about and no fear of data leaking, you can convert and validate right in your browser.
Key features
100% safe
Your input is never sent to a server. All processing happens only in your browser.
Instant results
With no network round-trip, results appear instantly — and it works even when you are offline.
Completely free
Use every feature for free, with no sign-up and no usage limits.
🔒 Your data is safe
Nothing is sent to a server
Every feature in Dev Tools is processed 100% in your browser. The JSON, tokens, and passwords you enter are never sent to our servers.
How is this possible?
Using modern web technologies (Web Crypto API, TextEncoder, JavaScript), every conversion and calculation runs inside your browser. It can even work without an internet connection.
No data retention
Your input is stored only temporarily in browser memory, and all data is automatically deleted the moment you close or refresh the page.
Available tools
- JSON formatter & validator: indentation, minification, validity check, key sorting
- Base64 encode / decode: UTF-8-safe text conversion and file data URLs
- URL encode / decode: two-way conversion and a query-string parser
- Color converter: convert between HEX, RGB, and HSL with preview
- Timestamp converter: Unix timestamp to local / UTC date conversion
- Hash / JWT / QR / UUID: SHA hashing, JWT decoding, QR generation, UUID generation
Contact
If you have any questions or suggestions about Dev Tools, please reach out through our contact page.