Privacy-First Utilities. Zero Data Egress.
Convert sensitive JSON, YAML, CSV datasets, optimize images, and decode credentials directly in your browser. No files or strings ever leave your device.
Structured Data Converter
Convert between JSON, YAML, CSV, and XML instantly with live preview.
Client-Side Image Lab
Transcode WebP, PNG, JPEG with quality compression and zero uploads.
Text & Encoding Studio
Encode/decode Base64, Hex, URL encoding, HTML entities, and Markdown.
X.509 Certificate Inspector & Exporter
Inspect SSL/TLS certificates and convert between PEM, DER, and Public Key formats.
EDI X12 & UN/EDIFACT Viewer & Converter
Inspect ANSI X12 and EDIFACT documents and convert between EDI, JSON, and XML.
JWT & OAuth Token Debugger
Decode, verify Web Crypto signatures, and inspect OAuth tokens client-side.
Client-Side PDF Privacy Lab
Merge, split, extract, rotate, and organize PDF documents with zero server uploads.
Cryptographic Checksum & File Hash Studio
Compute and verify SHA-256, SHA-512, MD5, CRC32, HMACs, and PBKDF2 keys.
SQLite Database Explorer & Exporter
Open, query, browse tables, and export SQLite databases via in-browser WebAssembly.
Code & Text Diff / Patch Studio
Compare code and text side-by-side with word-level highlighting and patch export.
Offline QR Code & Barcode Studio
Generate, batch print, and decode 1D/2D barcodes and QR codes client-side.
Client-Side Regex Workbench & Tester
Test regular expressions with real-time match highlighting, group extraction, and substitution.
Markdown & Technical Documentation Studio
Author, preview, and format Markdown documents with frontmatter, tables, and HTML/PDF export.
Media Privacy Lab & Metadata Scrubber
Inspect & strip EXIF/GPS metadata from photos losslessly and trim audio waveforms.
Network & Subnet CIDR Studio
IPv4 & IPv6 CIDR subnet calculator, VLSM planner, IP collision detector, and bitmask visualizer.
Date, Time, Epoch & Cron Precision Studio
High-precision Unix epoch converter (s/ms/µs/ns), date math, timezone matrix, and cron explainer.
Video & Audio Transcoder Studio
Strip audio losslessly, extract and convert MP3/FLAC/WAV/OGG/AAC, transcode video, and export animated GIFs.
CSS & Modern Color Palette Studio
Bi-directional HEX/RGB/HSL/OKLCH conversions, WCAG & APCA contrast checker, color blindness simulator, and harmonies.
Provably Fair & Random Studio
Provably fair commit-reveal, polyhedral dice, Gaussian normal distribution, and Diceware.
Why Zero-Knowledge Matters
Most online converters upload your spreadsheets, images, and keys to unknown cloud servers. Privatools is architected differently.
100% Client-Side Sandbox
Computations happen inside your browser’s isolated V8/SpiderMonkey runtime. You can even disconnect your Wi-Fi and the tools keep working.
Fast Local Execution
No network round-trips, file upload latency, or server queue bottlenecks. Computations execute directly in device memory at native hardware speeds.
Verifiable Privacy Proof
Inspect our source-available code on GitHub or check your browser’s DevTools Network tab. Tool processing makes zero data-upload requests. Zero telemetry, zero analytics tracking.