Codalata

Pretty-print, minify, and validate JSON with clear error positions.

Compare two blocks of text with line-level diff and intra-line highlights.

Convert Unix epoch timestamps to human dates and back, live.

Decode a JWT header and payload, with exp/iat/nbf humanized.

UTF-8-safe Base64 encode/decode, with a URL-safe variant.

Test a JavaScript regular expression against sample text.

Plain-English cron description with its next 5 run times.

Percent-encode or decode URLs and query strings, component or full-URL.

Convert identifiers between camel, snake, kebab, Pascal, CONSTANT and more.

Convert numbers between decimal, hex, octal and binary — BigInt-exact.

Convert colors between HEX, RGB, HSL and HWB, with a WCAG contrast checker.

Convert CSV to JSON — RFC 4180 quoting, delimiter auto-detect, type inference.

IPv4 subnet math — network, broadcast, usable range, masks and host counts.

Encode or decode HTML entities — named, numeric and hex forms.

Build a 5-field cron expression from presets or fields, with a live preview.

Sort, dedupe, trim, reverse and re-delimit lists of lines.

Break a URL into protocol, host, path segments and decoded query params.

Unix permission grid with octal, symbolic and special-bit sync.

Compare two JSON documents — added, removed and changed values by path.

Pretty-print or minify XML, with clear parse-error reporting.

Convert a JSON array to CSV — dot-path flattening, RFC 4180 quoting.

Turn CSV or TSV into an aligned GitHub-flavored Markdown table.

Searchable reference of every HTTP status code, official and vendor.

Convert a curl command into JavaScript fetch and Python requests code.

Pretty-print or minify CSS — calc()-safe, strings and url() untouched.

Create and sign a JWT with HS256/384/512 — WebCrypto, fully in-browser.

Build or decode an HTTP Basic Authorization header — RFC 7617, UTF-8.

Words, characters, sentences, paragraphs and bytes, with reading and speaking time.

Check a JSON document against a Draft-07 schema — every error names its path and keyword.

Inspect a UUID or ULID — version, variant, embedded timestamp, node and random bits.