Every developer keeps a tab open with the essentials. Here are ten that earn their place in your bookmarks bar.
The shortlist
- JSON Formatter - beautify and validate JSON instantly.
- Regex Tester - build and debug patterns in real time.
- Base64 Encoder - encode/decode without a terminal.
- JWT Decoder - inspect token claims at a glance.
- Hash Generator - MD5, SHA-1 and SHA-256.
- Diff Checker - compare two blobs of text side by side.
- URL Shortener - clean links for docs and demos.
- QR Generator - quick codes for mobile testing.
- Color Converter - HEX ↔ RGB ↔ HSL in one box.
- Lorem Ipsum - placeholder copy on demand.
Why bundle them
Context-switching between a dozen random sites is friction. Toolknot puts the essentials behind one fast, private interface so you stop hunting and start shipping.
{
"tip": "Bookmark /tools and pin the tab.",
"saved_clicks_per_day": 42
}
Keep them one keystroke away and your future self will thank you.
Frequently asked questions
What developer tools should I bookmark?
Start with a JSON formatter, regex tester, base64 encoder, JWT decoder and hash generator - they cover the most common day-to-day tasks for engineers.
Are these developer tools free?
Yes. All of these tools are free to use on Toolknot, and most run instantly in your browser with no account needed.