Free Developer Tools

Format, validate, and minify JSON instantly.

Encode and decode Base64 strings.

Encode and decode URL percent-encoding.

Create MD5, SHA-1, and SHA-256 hashes.

Generate strong random passwords.

Generate random UUID v4 identifiers.

Format, validate, and minify JSON instantly.

Encode and decode Base64 strings.

Encode and decode URL percent-encoding.

Convert HEX, RGB, and HSL colors.

Create MD5, SHA-1, and SHA-256 hashes.

Decode JWT header and payload claims.

Generate strong random passwords.

Test and debug regular expressions live.

Encode and decode HTML entities.

Generate random UUID v4 identifiers.

Convert Unix time to dates and back.

Convert text ↔ binary bit strings.

Browse and search HTTP status meanings.

Convert bits, bytes, KB, and related sizes.

Convert px, rem, em for CSS layouts.

Create CSS linear and radial gradients.

Build and preview CSS box-shadows.

Generate CSS border-radius values.

Build harmonious UI color palettes.

Minify CSS for smaller production files.

Parse browser user-agent strings.

Find MIME types by file extension.

Create crontab expressions visually.

Pretty-print and indent SQL queries.

Convert YAML or YML into JSON.

Convert JSON into readable YAML.

Score password strength privately in-browser.

IPv4 networks, masks, and host counts.

Compress HTML by stripping spare whitespace.

Convert CIDR notation to ranges and masks.

Minify JavaScript for smaller downloads.

Create and sign JWTs for testing.

Explain cron expressions in plain English.

Convert cURL into fetch() code.

Structural diff for two JSON objects.

Create HMAC-SHA signatures locally.

Create TypeScript types from JSON.

Beautify and indent XML markup.

Create bcrypt hashes in your browser.

Encode any file to Base64 text.

Build responsive CSS clamp() expressions.

Parse and rebuild URL query parameters.

Preview common responsive viewport breakpoints.

Create short URL-safe unique IDs.

Create time-based UUID v1 values.

Check Luhn/mod10 checksums locally.