Free browser tools for developers and everyday technical work.

Free JSON formatter, validator, and minifier with clear local parse feedback.

Format or minify SQL locally without executing anything or assuming a specific backend.

Free Base64 encoder and decoder for UTF-8 text with local processing and strict validation.

Encode or decode full URLs and URL components without overwriting your source text.

Parse raw query strings into editable rows and rebuild them with repeated keys intact.

Free QR code generator for text, URLs, Wi-Fi, email, phone, and SMS with local PNG and SVG export.

Generate practical Code 128, EAN-13, and UPC-A barcodes with local SVG and PNG export.

Test ECMAScript regex patterns with flags, capture groups, and replace preview.

Turn titles into clean, lowercase slugs with predictable normalization.

Convert text into camelCase, PascalCase, snake_case, kebab-case, title case, and more.

Count words, characters, lines, paragraphs, and estimated reading time locally.

Move cleanly between Unix timestamps, local time, and UTC.

Create strong passwords with secure browser randomness.

Hash text locally with SHA-256, SHA-384, or SHA-512 using Web Crypto.

Decode JWT headers and payloads locally, then inspect claims and key timestamps safely.

Compare two text blocks with readable line and inline changes.

Generate UUID v4 or v7 values locally, one at a time or in bulk.

Inspect dotenv text with comments, quoted values, duplicates, and malformed lines surfaced clearly.

Write Markdown on the left and review a sanitized local preview on the right.

Preview HTML in a sandboxed iframe with scripts stripped and unsafe handlers removed.

Convert between HEX, RGB(A), and HSL(A) with a live swatch and copy-ready outputs.

Inspect the current browser environment, including viewport, platform, storage support, and theme preference.

Parse pasted robots.txt content and surface directives, comments, and malformed lines.

Validate pasted sitemap XML and list the URLs or child sitemap locations it contains.