Twenty one focused utilities
ZAP51 Toolbox
Small tools for networks, integrity, encoding, credentials, text comparison, public key cryptography, and time conversion.
Local processing unless a tool says otherwiseRecently used
Base64 Codec
Encode or decode Unicode text and local binary files.
/tools/base64/ ↗ PKI · 02Certificate Inspector
Decode X.509 identity, validity, algorithms, SANs, and fingerprints.
/tools/certificate-inspector/ ↗ PKI · 03Certificate Lab
Build PKCS#10 requests and self-signed X.509 certificates.
/tools/certificates/ ↗ Integrity · 04Checksum Lab
Generate secure hashes for text and local files in your browser.
/tools/checksum/ ↗ Time · 05Cron Expression Explainer
Explain cron schedules and preview upcoming runs by time zone.
/tools/cron/ ↗ PKI · 06CSR Inspector
Inspect certificate requests and verify their embedded signatures.
/tools/csr-inspector/ ↗ Cryptography · 07 PreferredECDSA Key Generator
Create compact elliptic curve key pairs using the preferred modern default.
/tools/ecdsa/ ↗ Network · 08IPv4 Calculator
Calculate networks, masks, host ranges, and broadcast addresses.
/tools/ipv4/ ↗ Data · 09JSON Formatter and Diff
Validate, format, and compare JSON by property and array position.
/tools/json/ ↗ Security · 10JWT Inspector
Decode claims and optionally verify token signatures locally.
/tools/jwt/ ↗ Identity · 11Key Inspector
Identify and convert compatible OpenSSH, PEM, and JWK keys.
/tools/key-inspector/ ↗ Network · 12Network Lens
See the IPv4 address and browser details visible to this page.
/tools/network/ ↗ Security · 13Password Generator
Create strong random passwords with configurable character sets.
/tools/passwords/ ↗ Text · 14Regex Tester
Test expressions, inspect captures, and preview replacements.
/tools/regex/ ↗ Cryptography · 15RSA Key Generator
Generate RSA key pairs when compatibility requires them.
/tools/rsa/ ↗ Cryptography · 16Sign and Verify Lab
Create and verify digital signatures for text or local files.
/tools/sign-verify/ ↗ Security · 17 Ed25519 defaultSSH Key Generator
Create OpenSSH key pairs and fingerprints entirely in your browser.
/tools/ssh-keygen/ ↗ Text · 18Text Diff
Compare two text versions with readable line-level changes.
/tools/text-diff/ ↗ Time · 19Time Zone Converter
Translate a local date and time between global time zones.
/tools/timezone/ ↗ Generator · 20Token Generator
Create UUIDs and cryptographically secure random tokens locally.
/tools/tokens/ ↗ Time · 21Unix Time Lab
Convert timestamps and dates with live local and UTC views.
/tools/time/ ↗No matching tools found.