● CLIENT-SIDE ONLY — YOUR DATA NEVER LEAVES YOUR BROWSER
Developer Tools & Security Guides
A growing set of free, privacy-first tools built for developers who care about what happens to their data. Every tool runs entirely in your browser — no server, no logs, no telemetry.
Browse All Tools →Free Browser Tools
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Log Sanitiser
Strip emails, IPs, tokens, and other PII from log files before sharing or storing them.
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SQL Formatter
Beautify and format SQL queries — including messy ORM-generated output — for easier reading.
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JWT Decoder
Decode and inspect JWT header and payload entirely client-side. Signature never leaves your browser.
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Text Diff
Compare two blocks of text and highlight additions, deletions, and changes inline.
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Python Cleaner
Sanitise Python scripts before sharing — strips hardcoded secrets, tokens, and credentials.
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File Verifier
Generate and verify SHA-256 / MD5 checksums for any file, entirely in your browser.
Security & Privacy Guides
Practical, developer-focused articles on handling sensitive data safely.
Logging
GDPR-Compliant Logging: A Developer's Guide
JWT
JWT Token Expired — How to Fix It
SQL
How to Read ORM-Generated SQL
Logging
HIPAA-Compliant Log Redaction for Developers
JWT
The Hidden Dangers of Online JWT Debuggers
SQL
Guide to Secure SQL Formatting
AI Safety
Is It Safe to Paste Logs into ChatGPT?
AI Safety
How to Share Code with ChatGPT Safely
AI Safety
How to Secure Your Data When Using AI Tools
⚖️ Legal PDF Bates Stamper
Add sequential Bates numbers to PDF pages for legal discovery and document management — fully client-side, no upload required.