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.
Base64 vs Base64URL
See how the alphabets, padding, and URL-safe variants differ before converting data.
CVE-2026-33143: OneUptime Webhook Signature Verification
What the OneUptime advisory affected, how the fix changes the webhook trust boundary, and how to test signed webhook handlers safely.