Free Online Developer Tools

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

Encrypt and decrypt text using AES encryption algorithm.

Encode and decode text to/from Base64 format.

Encode and decode URLs for safe transmission.

Generate QR codes for text, URLs, and other data.

View, edit, and convert Markdown with live preview and export.

Generate MD5, SHA1, SHA256, and other hash values.

Generate v1, v3, v4, v5, and v7 UUIDs and GUIDs with custom formatting.

Create cryptographically secure random passwords with a live strength meter.

Decode and inspect JWT header, payload, and claims with an expiry check.

Convert text to UPPERCASE, lowercase, Title, camelCase, snake_case, and more.

Convert titles into clean, SEO-friendly URL slugs with bulk one-per-line input.

Generate placeholder and dummy text by paragraphs, sentences, or words.

Bulk find and replace text with case-insensitive, whole-word, and regex options.

Sort lines of text alphabetically, numerically, by length, reversed, or shuffled.

Remove duplicate lines from text — keep first occurrence, ignore case, trim, sort.

Delete line breaks and blank lines; join lines with a space or custom string.

Generate SEO meta, Open Graph, and Twitter Card tags with live previews.

Convert JSON to YAML and YAML to JSON instantly, with live validation.

Convert JSON arrays to CSV and CSV back to JSON, both directions, RFC-4180 safe.

Beautify or minify XML with custom indentation and basic validity checks.

Beautify and format SQL queries for MySQL, PostgreSQL, Oracle, and more dialects.

Format and beautify HTML, CSS, and JavaScript with custom indentation.

Create bcrypt and SHA htpasswd entries for Apache and nginx Basic Auth.

Minify JavaScript, CSS, and HTML to shrink files, with a live size-savings readout.

Turn any image into favicons — ICO, PNG, Apple touch, and Android Chrome icons.

Chrome extension to organize website links into groups with sidebar access and export/import.