Developer tools that never see your data
Format and validate JSON, convert between CSV and JSON, encode Base64 and URLs, and make QR codes. Safe for API responses, tokens and customer data: nothing is uploaded.
- No uploads
- No sign-up
- No cookies or trackers
- Works offline
6 developer tools
Every tool runs in your browser. Pick one to start.
JSON formatter & validator
Format, validate and minify JSON.
JSON → JSONOpen toolCSV to JSON
Convert CSV tables to JSON.
CSV → JSONOpen toolJSON to CSV
Convert JSON arrays to CSV tables.
JSON → CSVOpen toolBase64 encoder / decoder
Encode and decode Base64 text and files.
TXT → B64Open toolURL encoder / decoder
Encode and decode URLs and query strings.
URL → URLOpen toolQR code generator
Make QR codes for links, text and Wi-Fi.
TXT → QROpen toolBuilt for private data
Developers paste sensitive things into online tools every day: API responses with customer data, tokens, configuration files. A formatter that sends your JSON to a server is a data leak waiting to happen. These tools run entirely in your browser, under a strict security policy that blocks sending data to any other website.
Questions
Is it safe to paste API keys or tokens?
Your data stays in your browser and is never sent to us. As a good habit, still avoid pasting live secrets into any website, and rotate keys that may have been exposed.
Do the tools work offline?
Yes. After your first visit the site is saved on your device, so the tools keep working without internet.
Is my data stored?
No. Nothing is saved or logged. Close the tab and it is gone.