JSON formatter
Pretty-print, validate and sort keys, with a JSONPath filter to grab subtrees.
About JSON formatter// the toolbox
50+ tools in one window.
Every tool Hexkit ships, with a short description and a screenshot where one's available. Filter the list on the left; the preview on the right tracks whatever you focus.
JSON & data
JSON minify
Strip whitespace down to a single line for embedding in headers or env vars.
About JSON minify
HTML → JSX
Convert raw HTML to React-friendly JSX (className, self-closing tags, etc.).
About HTML → JSX
PHP array ↔ JSON
Parse PHP's serialize() format and emit JSON, or go the other way.
About PHP array ↔ JSON
Encode & decode
Screenshot coming soon
JWT debugger
Decode header + payload + signature, and verify HS256/384/512 signatures.
About JWT debugger
Backslash escape
Escape or unescape control characters (tabs, newlines, quotes…).
About Backslash escape
Luhn checker
Validate Luhn-checked numbers (credit cards, IMEI, ID numbers) and propose the correct check digit.
About Luhn checker
BER-TLV / EMV decoder
Parse EMV chip-card data into a nested tag tree with EMV tag names attached.
About BER-TLV / EMV decoder
X.509 certificate
Decode PEM/DER certificates into issuer, subject, SANs, fingerprints and validity windows.
About X.509 certificateConvert
Case converter
Re-case identifiers to camelCase, PascalCase, snake_case, kebab-case, CONSTANT, Title and more.
About Case converter
Color converter
Convert HEX (incl. alpha), RGB(A), HSL(A), HSB, HWB and CMYK with a built-in picker.
About Color converter
cURL → code
Turn a curl command into idiomatic JavaScript / Python / Go / Rust HTTP code.
About cURL → codeGenerate
UUID / ULID / Nano ID
Generate UUID v4, UUID v7, ULID or Nano ID — single or batches, optionally lowercased.
About UUID / ULID / Nano ID
Hash (MD5 → SHA-512)
Compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 in one shot.
About Hash (MD5 → SHA-512)
Random string
Crypto-grade random strings with selectable character classes and length.
About Random string
Screenshot coming soon
X.509 certificate generator
Mint test self-signed certificates with custom SANs and validity.
About X.509 certificate generator
Test credit card numbers
Generate Luhn-valid TEST card numbers across Visa, Mastercard, Amex, Discover, JCB, Diners and UnionPay.
About Test credit card numbersInspect & preview
Screenshot coming soon
X.509 inspector
Tree view of a certificate's fields, extensions and signature chain.
About X.509 inspectorScreenshot coming soon
ID inspector
Detect the kind, version and variant of an ID (UUID, ULID, Nano ID, etc.).
About ID inspectorCryptography
Generate PGP key pair
Mint an Ed25519 + Curve25519 OpenPGP key pair, ASCII-armored, with an optional passphrase.
About Generate PGP key pair
PGP encrypt
Encrypt a message to a recipient's OpenPGP public key (SEIPDv1 / AES-256).
About PGP encrypt
PGP encrypt and sign
Encrypt to a recipient and sign with your key in one inline-signed message.
About PGP encrypt and sign
PGP decrypt and verify
Decrypt an inline-signed PGP message and verify the embedded signature in one step.
About PGP decrypt and verifyText
Line sort / dedupe / trim
Sort, reverse, dedupe and trim lines in one pass.
About Line sort / dedupe / trim
CSS / SCSS / Less beautify
Beautify or minify CSS, SCSS and Less from one input.
About CSS / SCSS / Less beautify
HTML beautify / minify
Re-indent HTML or strip whitespace, comment-preserving.
About HTML beautify / minifyScreenshot coming soon
Screenshot coming soon
Try the real thing.
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