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Developer Tools

Free online tools for developers — format JSON, generate passwords, pick colors, create QR codes and more.

All Developer & Media Tools (19 tools)

📋

JSON Formatter

Beautify, minify, and validate JSON data with syntax highlighting. Easily spot errors in your JSON.

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🔑

Password Generator

Generate strong, secure, random passwords with custom length, symbols, numbers, and uppercase settings.

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🎨

Color Picker

Pick any color and instantly convert between HEX, RGB, HSL formats. Copy values with one click.

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📱

QR Code Generator

Generate QR codes for URLs, WiFi, email, phone, SMS, vCard contacts, and locations. Download as PNG or SVG.

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🎵

Audio Metadata Editor

Edit MP3 title, artist, album, year, and genre tags without changing the audio.

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🔐

File Encryptor

Encrypt and decrypt any file using password-based AES-256-GCM encryption.

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🗜️

ZIP File Creator

Bundle multiple files into a standard ZIP archive entirely in your browser.

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Barcode Generator & Scanner

Create printable retail barcodes or scan a supported barcode from an image.

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🎵

Audio Trimmer

Cut audio to exact start and end times and export the selection as WAV.

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🎬

Video Trimmer

Cut a browser-supported video and export the selected section as WebM.

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🎞️

Video Compressor

Reduce video resolution and bitrate locally for smaller, shareable files.

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🔗

UTM Builder

Create correctly encoded campaign URLs for analytics.

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🪪

JWT Decoder

Inspect JWT headers, payload claims and expiry locally.

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🧪

Regex Tester

Evaluate JavaScript regex matches and capture groups.

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🌐

API Tester

Send browser HTTP requests and inspect responses.

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🆔

UUID Generator

Generate secure UUID v4 identifiers in bulk.

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⏱️

Cron Builder

Build standard five-field cron schedules.

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🗄️

SQL Formatter

Format or minify SQL queries in the browser.

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📝

Markdown Preview

Write Markdown with a safe live HTML preview.

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