Tools
- JSON Formatter & Validator: beautify, minify and validate, with the common error patterns and how to fix them.
- Unix Timestamp Converter: epoch seconds or milliseconds to local time, UTC and ISO 8601, and back. Covers the Year 2038 problem.
- Base64 Encoder / Decoder: UTF-8-safe encoding for Hindi, Marathi and emoji, plus Base64 vs Base64URL explained.
Why client-side matters
Developers often paste API responses, JWTs, config files and logs into online tools. Many of these contain tokens, personal data or internal URLs. Our developer tools use only browser built-ins (JSON.parse, Date, TextEncoder-equivalent UTF-8 handling) and make no network requests with your input. Once the page has loaded, you can go offline and they keep working.
Quick reference
| Task | One-liner |
|---|---|
| Current Unix time (Bash) | date +%s |
| Pretty-print JSON (Python) | python -m json.tool file.json |
| Pretty-print JSON (jq) | jq . file.json |
| Base64 encode (Linux) | echo -n 'text' | base64 |
| Base64 decode (Linux) | echo 'dGV4dA==' | base64 -d |
| Epoch ms in JavaScript | Date.now() |
Working across time zones? The Time Zone Converter handles daylight saving automatically.