8 Free Browser Tools Every Developer Should Bookmark

We all have that collection of bookmarks — tools we
reach for daily but can never remember the URL for.
Here are 8 free browser-based utilities that run
entirely client-side (no uploads, no sign-up).

---

1. JSON Formatter & Validator

Stop squinting at minified API responses.
🔗 utilvox.com/tools/json-formatter

Paste any JSON → instantly formatted, validated,
with tree view. Errors highlighted with line numbers.

---

2. JWT Decoder

Inspect tokens without touching your terminal.
🔗 utilvox.com/tools/jwt-decoder

Paste a JWT → header, payload, signature decoded
instantly. Expiry time shown in human-readable format.

---

3. Regex Tester

Test patterns with live match highlighting.
🔗 utilvox.com/tools/regex-tester

Write regex → test against sample strings →
see matches highlighted in real time.
Supports flags: g, i, m, s.

---

4. UUID Generator

Stop writing uuid() boilerplate just to get an ID.
🔗 utilvox.com/tools/uuid-generator

Generates v4 UUIDs instantly. Bulk generate
up to 100 at once. One-click copy.

---

5. Base64 Encoder / Decoder

🔗 utilvox.com/tools/base64

Encode strings or files to Base64.
Decode Base64 back to text or binary.
Useful for auth headers, data URIs, email attachments.

---

6. URL Encoder / Decoder

🔗 utilvox.com/tools/url-encoder

Encode special characters for URLs.
Decode encoded URLs back to readable strings.
Essential for debugging query parameters.

---

7. Color Contrast Checker

🔗 utilvox.com/tools/contrast-checker

Check WCAG accessibility compliance for
text/background color combinations.
Shows AA and AAA pass/fail instantly.

---

8. PDF Compressor

Yes, developers deal with PDFs too.
🔗 utilvox.com/tools/pdf-compress

Shrink PDF size up to 90% — runs in browser,
no server upload, no watermark.
Useful for reducing assets before deployment.

---

Why Browser-Based?

All of these run client-side only:

• ✅ Your data never leaves your device
• ✅ No API keys or accounts needed
• ✅ Works offline after first load
• ✅ No rate limits

All tools are at utilvox.com —
170+ utilities in one place.

---

What tools are missing from your daily workflow?
Drop them in the comments — I'm actively building.