Developer Tools
Small, dependable utilities for developers: format and validate JSON, encode Base64, generate UUIDs and QR codes — with no data leaving the page.
Popular tools
JSON Formatter
Pretty-print JSON with 2, 4 spaces or tabs, and optionally sort keys.
JSON Validator
Check if JSON is valid and see the exact line and column of any error.
JSON Minifier
Remove whitespace to make JSON as small as possible.
Base64 Encoder / Decoder
Encode and decode Base64 text or files, with URL-safe and UTF-8 support.
UUID Generator
Generate random version 4 UUIDs in bulk.
QR Code Generator
Create QR codes for links, text, Wi-Fi, UPI and contact details. Download PNG or SVG.
Popular workflows
Multi-step solutions that use these tools.
API-Ready JSON
JSON → Minified, validated JSONTurn messy JSON into a compact, valid API payload.
Readable JSON for Review
JSON → Sorted, formatted JSONMake JSON easy to read and diff.
Config Clean-Up
JSON → Clean config JSONTidy a JSON config file.
Spreadsheet to API JSON
CSV → Minified JSON arraySend spreadsheet data to an API.
CSV to Readable JSON
CSV → Formatted JSONInspect CSV data as structured JSON.
JSON to Spreadsheet
JSON → CSV fileOpen API data in Excel or Google Sheets.
FAQ
Can I paste sensitive data such as API responses?
Yes. Developer tools run locally in your browser and never send your input to a server.