Free Developer Tools Online

Format, validate and minify JSON online free. Instant client-side processing.

Encode and decode Base64 strings and files online free.

Encode and decode URLs and query strings online free.

Generate strong, cryptographically secure random passwords online free.

Encode and decode HTML entities online free.

Test and debug JavaScript regular expressions online with live match highlighting.

Convert numbers between binary, octal, decimal and hexadecimal instantly.

Convert Unix timestamps to dates and back online free. Live current timestamp.

Minify and beautify CSS code online free. Reduce CSS file size instantly.

Decode and inspect JWT tokens. View header, payload, expiry time. Client-side only.

Generate QR codes for URLs, WiFi, vCards, email and text. Custom colors and logo.

Build a professional resume online free. 3 templates, PDF download, ATS score.

Create Markdown tables visually. Import CSV, set alignment, export as Markdown or HTML.

Free online Pomodoro timer with focus sessions, short and long breaks, sound alerts, and browser notifications.

Check how strong your password is. See crack time estimates, get improvement tips, and generate secure passwords.

Format and beautify SQL queries. Supports MySQL, PostgreSQL, SQLite, T-SQL and BigQuery.

Convert between JSON and CSV formats. Supports nested objects, custom delimiters, type inference.

Free online countdown timer with multiple simultaneous timers, date countdown, sounds, and fullscreen.

Format and beautify HTML online free. Minify HTML for production. Syntax highlighting and diff view.

View, sort, filter, and edit CSV files online free. Export to JSON, TSV, or Markdown table.

Generate UUID v1, v4, v5, ULID and NanoID. Bulk generation up to 1000 IDs.

Build cron expressions visually. Human-readable descriptions and next run times.

Record your screen directly in the browser. No software, no upload. Save as WebM.

Find perfect Google Fonts combinations. Live preview with custom text. Copy CSS import.

Create favicons from text, emoji, or image. Download complete package with all sizes.

Test typing speed and accuracy. Get WPM score with accuracy, consistency, and time charts.

Convert between binary, hex, decimal, and octal. Text↔binary mode and bitwise operations.

Build multi-layer CSS box shadows visually. Copy CSS or Tailwind classes instantly.

Generate CSS Flexbox and Grid layouts visually. Live preview and copy CSS.

Searchable Tailwind CSS reference with copy-on-click. Covers all categories, v3 and v4.

Convert between YAML and JSON formats with syntax highlighting and error detection.

Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes from text or files online free. Verify checksums instantly.

Generate a free privacy policy for your website or app using AI. GDPR and CCPA compliant. Download as text or HTML.

Generate barcodes in Code 128, EAN-13, UPC-A, Code 39 and more. Download SVG or PNG.

Convert between JSON and XML formats. Handles nested objects, arrays, and attributes.

Look up any IP address: location, ISP, country, city, timezone, and network details.