Free Data Tools
Handy utilities and notes for data people. No fluff, just useful stuff.
Free in-browser data tools
Explore our collection of free, browser-based data tools. Everything runs locally in your browser — no uploads, no tracking — so your data stays private. From CSV converters and JSON formatters to quick text utilities, the focus is on speed, simplicity, and privacy.
Popular
- CSV → JSON
Paste CSV and download JSON in your browser.
- JSON → CSV
Paste JSON and download CSV in your browser.
- JSON Formatter & Validator
Pretty-print, minify, and validate JSON locally.
- Base64 Encoder
Convert text to Base64 online.
- Base64 Decoder
Decode Base64 strings back to text.
- URL Encoder
Percent-encode a string for safe use in URLs.
From the blog
- Why Online Tools Beat Desktop Software for Quick Conversions
With a browser-based tool, you’re only ever one click away from starting.
9/7/2025 • Free Data Tools
FAQ
Do my files get uploaded?
No. All tools run entirely in your browser. Your CSV/JSON/text data never leaves your device.
Are these tools really free?
Yes. They’re free to use with no sign-up. We keep things lightweight and privacy-friendly.