Your files never leave your computer
🔑
No uploads. No accounts. No telemetry. Everything runs in your browser.
Opens clean in every privacy browser - Brave, Firefox, uBlock Origin. The only third-party scripts are the CDN libraries at /built-with.
Every PrivBatch tool has a built-in Prove It mode. Click "Prove It" on any tool and watch the network monitor stay at zero - even while processing your files.
Learn how to verify it yourself →
Batch convert CSV to JSON or JSON to CSV. Custom delimiters, nested objects supported.
Convert XML to JSON and back. Attribute mapping, namespace-aware, schema-smart.
Convert .xlsx and .xls files to JSON or CSV. Multi-sheet support, column mapping.
Export SQL INSERT dumps or query results to JSON or CSV. Offline, instant.
Convert between YAML and JSON. Handles anchors, multi-document, and nested structures.
Encode text or binary files to Base64. Standard and URL-safe variants, auto-detects on paste.
Validate, pretty-print and minify JSON. Syntax errors highlighted with precise line numbers.
Query JSON data using JSONPath expressions. Filter, search and extract values without uploading your data.
Live markdown editor with instant preview. Export as standalone HTML or download .md file.
Convert between .env, JSON, and YAML. Handles comments, quoted values, and blank lines.
Compare two texts side by side. Color-coded additions and deletions with context collapsing.
Drop a broken file. Get a precise diagnosis. Fixed in seconds. Privately.
Decode and inspect JWT tokens fully offline. View header, payload, expiry, and algorithm claims.
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files. Fully offline, no CDN.
Replace real PII with realistic fake data. Auto-detects emails, names, phones, IPs and more.
Encrypt any file with a password using AES-256-GCM. The key never leaves your browser. PBKDF2 with 600k iterations, Web Crypto native.
Generate UUID v4 in bulk. Standard, uppercase, or braces format. Copy all with one click.
Encode or decode URLs. Component or full-URI mode. Live conversion as you type.
Parse and explain cron expressions. See the next 10 run times with relative timestamps.
Convert Unix timestamps to human dates and back. UTC, ISO 8601, RFC 2822, and relative time.
Convert between binary, octal, decimal, and hex. Live bit pattern visualiser included.
Convert between HEX, RGB, HSL, and HSV. Color picker, palette presets, and CSS output.
Find and replace with regex across many files at once. Live preview, capture groups, all five flags. 2-second timeout protects against catastrophic backtracking.