Free Developer Tools

Generate cryptographic keys (hex, base64, alphanumeric) in your browser.

Security & Keys

Strip values from .env files, keeping variable names for safe sharing.

Security & Keys

Decode JWT tokens to inspect header, payload, and expiry — without sending them anywhere.

Security & Keys

Generate strong passwords with configurable length, characters, and memorable mode.

Security & Keys

Generate SHA-256, SHA-512, MD5, and SHA-1 hashes from any text.

Security & Keys

Encode and decode Base64 strings. Supports text and file input.

Encoding & Conversion

Encode and decode URL components for safe use in query strings.

Encoding & Conversion

Convert between HTML entities and their character equivalents.

Encoding & Conversion

Convert images to Base64 data URIs for embedding in code.

Encoding & Conversion

Convert between CSV and JSON array formats. Handles headers.

Encoding & Conversion

Convert between actual line breaks and escaped \n characters.

Formatting & Text

Pretty-print and validate JSON with syntax error reporting.

Formatting & Text

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

Formatting & Text

Write markdown and see rendered output side by side.

Formatting & Text

Generate URL-friendly slugs from any text with configurable separators.

Formatting & Text

Minify SVG markup by removing comments, whitespace, and unnecessary attributes.

Formatting & Text

Generate v4 UUIDs, ULIDs, and nanoids. Bulk generation supported.

Reference & Calculation

Convert between Unix epoch timestamps and human-readable dates.

Reference & Calculation

Paste a cron expression, see a plain English schedule and next run times.

Reference & Calculation

Test regular expressions with live match highlighting and capture groups.

Reference & Calculation

Toggle permission checkboxes and get the numeric chmod value.

Reference & Calculation

Convert between bytes, KB, MB, GB, and TB in binary or decimal.

Reference & Calculation

Convert colors between HEX, RGB, and HSL with a live preview swatch.

Reference & Calculation

Compare two text blocks and see additions, deletions, and changes.

Reference & Calculation

Generate Open Graph and Twitter Card meta tags ready to paste.

Content & Web

Generate QR codes from any text or URL. Download as PNG.

Content & Web

Create placeholder images with custom dimensions, colors, and text.

Content & Web