Free tools that stay onyour device.
Developer utilities built to run in your browser. WebAssembly and ONNX keep every byte on your device. No servers, no uploads, no accounts.
Hover any tool and click the bookmark to pin it here.
Professional Workflows.
Chain multiple privacy-first tools together. Extract, scrub, and transform data entirely in your browser with zero server uploads.
Project Workbench
Draft Workflow • 0 Nodes
Waiting for pipeline
Add transformation steps to process your source data
Browse by category
Developer Tools
JSON, Base64, JWT, regex - tools devs use every day, processed privately in your browser.
AI & LLM Tools
LLM token counters, prompt optimizers, RAG visualizers, and local ONNX AI models processed completely offline.
Cryptography
Hash, HMAC, and AES encryption tools - all processed securely in your browser.
Data Tools
Local-first ML tools - cluster logs, explore CSVs, generate patterns, simulate A/B tests, and analyze performance profiles entirely in your browser.
Image Tools
Compress, resize, and convert images entirely in your browser - no upload, no account required.
Text Tools
Word counter, case converter, slug generator, diff checker - no server, no tracking.
Calculators
Percentage, fraction, average, and more - math calculators that work without a server.
Converters
Unit conversions that work instantly in your browser.
Color Tools
Color converters, contrast checkers, and palette utilities - all run in your browser.
Time & Date
Age calculator, date difference, countdown - instant date and time math in your browser.
Zero-Trust Utilities
Check for password breaches, remove GPS from photos, and strip link trackers - all locally.
New & Noteworthy
Upload a CSV, Parquet, or JSONL file and run SQL queries on it — powered by DuckDB WASM. No server. Your data never leaves your browser.
Redact emails, SSNs, credit cards, IP addresses, and phone numbers from text and logs. Add custom regex patterns. Runs entirely in your browser.
Parse bulk log lines from nginx, Apache, syslog, logfmt, and JSON formats into structured JSONL. File upload supported. Runs in your browser.
Convert logfmt key=value log lines to JSON and back. Bulk processing with file upload. Runs in your browser — no upload to server.
Upload documents and search them semantically using local AI embeddings. Runs 100% in your browser - files never leave your device.
Paste raw log lines and instantly cluster repeated patterns using TF-IDF and DBSCAN - runs 100% in your browser via WebAssembly.
Generate cryptographic hashes instantly in your browser using SHA-256, SHA-512, SHA-1, or MD5. All processing done locally.
Decode JWT tokens and inspect header and payload instantly in your browser. Your tokens never leave your device.
Test regular expressions with live match highlighting in your browser. Supports named groups and all JS regex flags.
Remove image backgrounds automatically with AI. Works best when the subject and background have decent contrast. Runs in your browser — photos stay private.
Transcribe audio to text entirely in your browser using Whisper. No upload, no server - your audio never leaves your device.
Upload a CSV to auto-detect column types, spot missing values, and fit a linear regression - all locally in your browser.
Architecture
Privacy by architecture, not policy.
Every utility runs via JavaScript, Web Workers, and WebAssembly — including ONNX local inference for ML. Zero-backend means your data genuinely never touches a server. Not by promise. By design.
Latest from the blog
Bulk Password Breach Checking: The Zero-Knowledge Way to Audit Your Vault
Is your password vault safe? Learn how to audit thousands of passwords for breaches simultaneously using k-anonymity—without ever uploading a single password to a server.
4 min readRemove GPS Data from Photos: Protect Your Location Without Losing Camera Settings
Every photo you take contains a footprint of where you've been. Learn how to surgically remove GPS coordinates from your images while keeping the EXIF data that matters to photographers.
4 min read