About WW Tools

100% Client-Side Processing

Every tool processes data entirely within your web browser using JavaScript and the Web Crypto API. Nothing is uploaded, logged, or stored on our servers. This makesWW Tools safe to use with sensitive data like API keys, tokens, and configuration files.

No Account Required

All tools are available immediately with no sign-up, email verification, or account creation. Just open the tool and start using it.

Fast and Lightweight

Built with Next.js and modern web technologies, the site loads quickly and tools respond instantly. No unnecessary bloat, no waiting for server responses.

Formatters

• 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.

Encoders & Decoders

• 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 with AES-GCM and RSA-OAEP.
• 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.

Generators

• 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.

Testers

• 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.

Converters

• 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.