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
SHA Hash Generator
Generate SHA-1, SHA-256, and SHA-512 digests in the browser.
Encoding & formatting
Base64 Converter
Encode and decode standard Base64 and Base64URL strings locally.
// 02 — Full toolkit
More tools by purpose.
Encoding & Formatting
Convert, format, compare, 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, timestamps, and shareable development artifacts.
// 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.
What Is a Webhook Signature and Why Must You Validate It?
Understand signature matching, timestamp checks, and replay defenses for production receivers.
How to Generate Cryptographic Hashes Offline
Choose an appropriate digest and keep sensitive source text out of remote utilities.
Base64 vs Base64URL
See how the alphabets, padding, and URL-safe variants differ before converting data.