Paste it. Transform it. Move on.
Single-purpose utilities for the data developers actually touch: JSON, Base64, JWTs, regex, hashes, timestamps, and more. Every transformation happens on your machine, in this tab.
JSON Formatter & Viewer
Parse, format, validate, escape/unescape, and explore JSON data with a tree view and stats.
Markdown Previewer
Write Markdown and preview rendered HTML with syntax highlighting and copy support.
SQL Formatter & Minifier
Beautify or minify SQL with real per-dialect tokenization for Postgres, MySQL, T-SQL, BigQuery, Snowflake, and more.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings with URL-safe variant support.
URL Encoder / Decoder
Encode, decode, and parse URLs with full component breakdown and query parameter table.
JWT Decoder & Verifier
Decode and verify JSON Web Tokens with signature validation, live expiry countdown, and claim explanations.
HTML Entity Encoder / Decoder
Encode and decode HTML entities with named and numeric entity support.
JWE Encrypt / Decrypt
Inspect, encrypt, and decrypt JSON Web Encryption tokens across the full JWA algorithm set.
cURL Converter
Paste a cURL command and get ready-to-run code for 8 languages, a live request-anatomy breakdown, and one-click secret redaction.
JWT Generator & Signer
Build and sign a JSON Web Token: edit claims as a form or raw JSON, pick HS/RS/PS/ES, supply or generate a key, and copy the signed token.
UUID Generator
Generate and validate UUID v4, UUID v7, and ULID identifiers with timestamp extraction.
Hash Generator
Generate and verify MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files.
JWKS Builder
Assemble several public keys into one JSON Web Key Set, with an RFC 7638 kid per key, a private-key leak guard, and duplicate-kid checking, ready to host at /.well-known/jwks.json.
Regex Tester
Test, replace, and explain regular expressions with live highlighting and named groups.
Diff Checker
Compare text with line-level and word-level diff, collapsible sections, and patch export.
Cron Expression Parser
Parse cron expressions with human-readable descriptions and next execution times.
Color Converter
Convert colors between HEX, RGB, HSL with WCAG AA/AAA contrast checker.
Timestamp Converter
Convert between Unix timestamps, ISO 8601, RFC 2822, and relative time formats.
Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal with two's complement.
YAML ↔ JSON Converter
Convert between YAML and JSON in both directions, plus a YAML reformat that keeps comments, anchors, and multi-document streams.
String Case Converter
Paste one identifier and get every naming case at once (camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE and more), each with its own copy button.
PEM ↔ JWK Key Converter
Convert RSA and EC keys between PEM and JWK in both directions, with an RFC 7638 thumbprint kid, a key-parameter inspector, and one-click public-only JWK and JWKS output.
CSV ↔ Markdown Table Converter
Convert CSV or TSV data into a GitHub-flavored Markdown table and back, on one screen with per-column alignment and correct pipe escaping.
JSON ↔ CSV Converter
Convert a JSON array, object, or NDJSON to CSV/TSV with documented nested-key flattening, and convert CSV back to nested, typed JSON, both directions on one screen.
WW Tools is 24 small utilities for the data developers actually touch: JSON, Base64, JWTs, regex, hashes, timestamps, and more. Every tool runs in your browser using standard JavaScript and the Web Crypto API. Nothing is uploaded, nothing is stored, and there are no accounts to create.