Tools

Small things I kept needing. They used to live behind a login on the old site and did their work on the server; now they run in your browser instead.

• Code scanner

  Read QR codes and barcodes with your camera or from an image. Every format ZXing knows.

• Code generator

  Make a QR code, Data Matrix, Aztec, PDF417 or a linear barcode and download it.

• Link inspector

  See where a link really goes before you open or shorten it: the real host, lookalike letters, hidden redirects and tracking parameters.

• Base converter

  Encode and decode between text and Base2 through Base85, or convert integers between any two bases.

• Hash generator

  MD5, SHA family, CRC32 and MySQL5 over text or a file. The file is read in your browser.

• JWT decoder

  Read a JSON Web Token's header and claims, with every timestamp as a date. Decoded right here; the token is never sent or stored.

• SSH key fingerprint

  SHA256 and MD5 fingerprints, key type and size, and SSHFP records for a public key. Private keys are refused unread.

• Password generator

  Random passwords from a CSPRNG, with the character classes you pick.

• TOTP generator

  Turn a TOTP secret or otpauth:// link into the current code. The secret stays on your device.

• Timestamp converter

  Unix time to a calendar date and back, in every format at once. Live clock included.

• Subnet calculator

  IPv4 and IPv6: network, range, host count, masks and reverse-DNS pointers.

• Image resizer

  Resize and convert an image without it ever leaving your browser. Re-encoding drops EXIF and GPS.

• IP info uses the server

  Your public IPv4 and IPv6, as this server sees them.

• PHP obfuscator uses the server

  Wrap PHP so it self-decodes at runtime. Runs on the server; the code is never stored.