Free Online Tools

Format, validate, and beautify JSON data with syntax highlighting.

Encode and decode text to and from Base64 format.

Encode and decode URLs. Handle special characters correctly.

Generate random UUIDs (v4) for use in databases and APIs.

Generate MD5, SHA-1, SHA-256, and other hash values from text.

Test and debug regular expressions with live matching and highlighting.

Convert between HEX, RGB, HSL, and other color formats.

Convert Unix timestamps to human-readable dates and vice versa.

Encode and decode HTML entities like &, <, >.

Minify CSS code to reduce file size and improve page load speed.

Minify JavaScript code to reduce bundle size.

Searchable ASCII reference: decimal, hex, octal, binary, HTML entity and names for 0–127.

Set each corner radius with sliders — including fancy blob shapes — and copy the CSS.

Tweak shadow offset, blur, spread, colour and opacity with a live preview box.

Toggle rwx checkboxes for owner, group and others to get octal and symbolic permissions.

Pick a base colour and get harmonies, tints, shades and a full tonal scale.

Pick schedule options from dropdowns and get a valid cron expression with an explanation.

Build linear or radial gradients with colour stops and copy the CSS instantly.

Turn CSV into a JSON array of objects, with quoted-field support and type detection.

Encode text as hexadecimal or decode hex back to text, in several common formats.

Compress HTML by stripping comments and whitespace, with a clear size-savings report.

Convert IPv4 addresses to integer, binary, hex and octal — and numbers back to IPv4.

Turn a JSON array into clean CSV with automatic headers, ready for Excel or Sheets.

Paste JSON and get clean TypeScript interfaces, with nested types named automatically.

Decode JWT headers and payloads, inspect claims and check expiry — fully offline.

Write Markdown and get clean HTML plus a live rendered preview side by side.

Create short, URL-safe unique IDs with custom length, alphabet and batch count.

Beautify SQL with clause line breaks, keyword casing and tidy indentation.

Enter an IPv4 address and CIDR to get network, broadcast, host range and mask details.

Inspect every character: codepoint, UTF-8 bytes, HTML entity and name.

Break a URL into protocol, host, path and a full query-parameter table.

Paste any user-agent string and see browser, OS, device type and engine detected.

Pretty-print XML with proper indentation, validate it, or minify it to one line.

Convert everyday YAML config into JSON, with nesting, lists and typed scalars.

Visual flexbox playground: direction, justify-content, align-items, wrap and gap controls with live preview and generated CSS.

Visual CSS grid builder: rows, columns and gap controls, click items to cycle spans, live preview and generated grid CSS.

Generate HTML tables from CSV data with header, striped and bordered options, live preview and copyable HTML plus CSS.

Generate a full tint and shade scale (10 steps each way) from any base color, with a palette strip and CSS variables output.

Test JSONPath expressions live: dot/bracket access, indexes, wildcards, recursive descent and filters, with every match and its full path.