Browser-local developer tools
Developer tools. No uploads.
Format, inspect, and verify sensitive data directly in your browser.
- Runs in your browser
- No tool-input processing backend
- Review every result
Start here · Credential hygiene
Safe-to-Share Sanitizer
Heuristically mask likely credentials before sharing text. Review the result.
// 01 — Focused workflows
One clear task at a time.
Use a purpose-built local workflow, then move on. No account or upload step.
Debugging & validation
Webhook Signature Verifier
Check whether supplied payload, secret, and signature values match locally.
Credentials & security
File Checksum & Hash Generator
Compare SHA-256 or SHA-512 file checksums locally, without uploading files.
Encoding & formatting
Base64 Converter
Encode and decode standard Base64 and Base64URL strings locally.
// 02 — Full toolkit
More tools by purpose.
Encoding & Formatting
Convert, format, and inspect text or structured data locally in your browser.
Credentials & Security
Inspect tokens, sanitize configuration, and generate security-related values without uploading sensitive input.
Debugging & Validation
Inspect signatures, identifiers, and timestamps.
// 03 — Practical guides
Security decisions, explained.
How to Sanitize .env Files Before Sharing
Learn where heuristic redaction helps, where it can miss, and why human review still matters.
Webhook Signature Validation: HMAC-SHA256 Best Practices
Understand signature matching, timestamp checks, and replay defenses for production receivers.
Hash Generator Guide: SHA-256, Password Hashing, and Verification
Choose an appropriate algorithm, verify a download against a trusted checksum, and know what a match proves.
Base64 vs Base64URL
See how the alphabets, padding, and URL-safe variants differ before converting data.