← Tools
Quantum Readiness
X.509 certificate decoder
Read a PEM certificate's subject, validity, key and extensions — and see whether its key survives a quantum-capable adversary.
A certificate is public by design — it is what a server hands to anyone who connects, so pasting one here is safe. Never paste a private key, which begins -----BEGIN PRIVATE KEY-----. This tool has no use for one.
Decoded entirely in your browser with a hand-written DER reader — no library, no upload, no logging. The certificate never leaves the page. This tool decodes and inspects; it does not validate a chain, check revocation, or verify the signature.
Other tools
- EDI viewer & validator (X12 + EDIFACT)
- JSON ↔ XML converter
- CSV ↔ JSON converter
- OpenAPI linter
- MCP tool-definition linter
- OpenAPI → agent tools
- Agent blast-radius calculator
- Prompt secret scanner
- Agent cost & context calculator
- Agent-readiness scorecard
- iPaaS readiness assessment
- Modernisation roadmap generator
- Migration risk register
- Cutover runbook builder
- Interface catalogue builder
- Migration wave planner
- Function Point estimator
- Platform migration assessor
- Fixed-width flat file parser
- webMethods flow reader
- SAP IDoc viewer
- SWIFT MT & ISO 20022 viewer
- HL7 v2 message viewer
- XSLT tester
- XPath tester
- CI/CD workflow security linter
- Regex tester & ReDoS checker
- Webhook signature verifier
- SLA & error budget calculator
- Retry & backoff simulator
- JSONPath tester
- JSON Schema generator
- Encoding & mojibake fixer
- JSON formatter & validator
- JSON diff
- Epoch & timestamp converter
- Base64 encoder & decoder
- UUID & ULID generator
- JWT decoder
- Cron expression explainer
- Interface math calculator
- Post-quantum migration matrix
- Post-quantum exposure calculator
These exist because the underlying problem is real. If the numbers you just put in look uncomfortable, that is usually worth a conversation.