Welcome
Fast, privacy-first utilities for JSON, CSV, strings and cryptography.
Everything runs locally in your browser.
JSON Validator
Validate, prettify, and minify JSON data
JSON CSV
Convert JSON arrays to CSV format
JSON Key Counter
Count keys and array elements in JSON
String Length Counter
Count characters, bytes, and lines
Base64 Encode/Decode
Convert strings to/from Base64
HMAC Signature Generator
Generate cryptographic signatures
CSV → JSON (Drag & Drop)
Convert CSV files to JSON format
JSON Validator Status: Not validated
Result Copy
[Mid Content Ad Placeholder 728×90 / responsive]
JSON → CSV
CSV Output Copy
JSON Object/Array Element Counter (by Key)
Counts
String Length Counter
Result
String ↔ Base64
HMAC Signature Generator
Signature Copy
CSV → JSON (Drag & Drop)
Drag & drop a CSV file here, or
JSON Output Copy