Encode and decode bench
Base64, URL, hex, HTML entities, ROT13 and gzip, in any order. It also reads the contents of a JWT; the signature is not checked.
Small tools for
everyday security work.
Ten utilities that run offline in the console, and Website Check for a domain you control.
UTILITIES
Ten tools that run in your browser.
Each one runs offline with no network, no installed binaries and no contact with any target. The page's content security policy blocks outgoing connections, and pasted text and chosen files stay on your device.
Timestamp converter
Unix, Windows FILETIME, WebKit, Excel and ISO times, in UTC and local.
Subnet and CIDR calculator
IPv4 and IPv6 ranges, masks, splits and address-in-range tests.
Certificate and CSR decoder
Paste a PEM certificate or CSR and read its names, dates, key size and issuer.
Secret and token inspector
Finds key, token and password patterns in pasted text, masked by default.
Checksum list verifier
Pick files, paste a SHA256SUMS list and see which match. Extends Evidence.
Log line parser
Turns syslog, web access and key=value logs into a filterable table.
File signature and entropy check
Magic bytes, extension mismatch, entropy and readable strings.
Passphrase generator and policy check
Random words and length rules, with no network.
Regex tester
Try patterns on pasted text, with a time limit on runaway patterns.
WEBSITE CHECK
Only check domains you control.
Website Check proves control through a DNS TXT record you publish for that domain, runs passive checks only (one HTTPS request to the home page, one to /.well-known/security.txt, and DNS reads of SPF, DMARC and CAA), follows no redirects and sends nothing else.
Publish a TXT record
In Security Center, open Web checks and add your domain. FieldKitOS shows you a TXT record once. Publish it at _fieldkit-verify.<domain>, then choose Verify.
Run the check
Choose Run check. Website Check makes the passive requests listed above and nothing else.
Save it to a case
Results save into your Casebook case and export as JSON or text.
Observations, not a verdict. The result is a list of observations, not a penetration test, vulnerability scan or malware verdict, and it does not show that a site is safe. Website Check needs an active subscription.
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Ready to try them?
The utilities and Website Check are part of FieldKitOS Security at A$49 a month. Your access code arrives by email.