Free Online Collection
Developer Tools
A curated collection of free online tools for developers. Encode, decode, format, analyze, and assess - all running securely in your browser. Your data never leaves your device.
Performance
Measure and optimize your website's speed and user experience
Core Web Vitals
Measure your website's Core Web Vitals and performance metrics with Lighthouse. Get detailed analysis of LCP, CLS, TBT, and INP with actionable AI-powered recommendations.
Network Performance Analyzer
Analyze all network requests, identify broken resources (4xx/5xx), measure timing metrics, and capture fully rendered HTML with JavaScript execution support.
Security
Audit SSL certificates, headers, and protect sensitive data
SSL Metrics
Analyze SSL/TLS certificates, check security configurations, and identify potential vulnerabilities in your website's HTTPS setup.
Security Headers
Check HTTP security headers like CSP, HSTS, X-Frame-Options, and more. Get a grade and recommendations to improve your website's security posture.
JWT Debugger
Decode and verify JSON Web Tokens instantly. Inspect headers, payloads, check expiration, and verify HMAC signatures - all in your browser.
Secure Log Sanitizer
Remove PII, API keys, and secrets from logs before sharing with AI assistants or posting to forums. Supports AWS keys, emails, credit cards, SSNs, and more.
Metadata Stripper
Remove EXIF, GPS coordinates, and personal metadata from images, videos, and audio files to protect your privacy before sharing online.
Design
Create favicons and convert media files between formats
Favicon Generator
Create complete favicon packages for websites and apps. Upload an image, customize with rounded corners and colors, and download ICO, PNG, and webmanifest files.
Image Converter
Convert images between formats including HEIC, WebP, PNG, JPG, and more. Resize images, adjust quality, and strip metadata for privacy.
Image Recovery
Attempt to recover corrupted or partially downloaded image files. Supports JPEG, PNG, GIF, WebP, BMP, TIFF, and HEIC formats using multiple repair techniques.
Image Filter
Apply preset filters like Vintage, Noir, and Warm or fine-tune with 9 adjustable sliders. Export as PNG, JPEG, or WebP. 100% browser-based, no uploads.
Audio Converter
Convert audio files between formats including MP3, AAC, WAV, FLAC, OGG, and more. Adjust bitrate, sample rate, and channels with optional normalization.
Audio Trimmer
Trim audio clips visually with a waveform timeline. Drag handles to set start and end points, then export instantly with lossless stream copy. No uploads required.
Video Converter
Convert video files between formats including MP4, WebM, AVI, MOV, WMV, and MPG. Adjust quality, resolution, and frame rate for optimal output.
Video Splitter
Split videos into multiple segments instantly in your browser. Manual split points, equal parts, or social media presets. No re-encoding, no uploads.
Media Converter
Convert video and audio files entirely in your browser using FFmpeg WASM. Supports MP4, WebM, MKV, MP3, WAV, FLAC, and more. Complete privacy with no uploads.
Video to GIF
Convert video files to high-quality animated GIFs in your browser. Trim clips, adjust frame rate, resolution, and quality with palette optimization. No uploads required.
Video Compressor
Compress video files directly in your browser. Choose quality presets or set a target file size. Supports MP4 and WebM output with real-time size estimation.
Video Trimmer
Trim video clips visually with a thumbnail filmstrip timeline. Drag handles to set start and end points, then export instantly with lossless stream copy. No uploads required.
Video Watermark
Add text or image watermarks to videos in your browser. Customize font, color, opacity, and position with 7 placement presets. Export as MP4 or WebM with no uploads.
Video Rotate & Flip
Rotate videos 90°, 180°, or 270° and mirror or flip them. Fix sideways phone recordings entirely in your browser using FFmpeg. No uploads, complete privacy.
OG Image Generator
Create stunning Open Graph images for social media sharing. Customize backgrounds, text, logos, and export as PNG or JPG. 100% free with no watermarks.
Web Screenshot
Capture high-quality screenshots of any website with customizable viewport sizes, output formats, and full-page capture. Perfect for documentation and archiving.
Encoding
Encode and decode URLs, HTML entities, Base64, and more
URL Encoder & Decoder
Encode special characters for URLs or decode percent-encoded strings. Supports component encoding, URI encoding, and recursive decoding.
HTML Encoder & Decoder
Convert special characters to HTML entities or decode entities back to text. Supports named and numeric entities for XSS prevention and safe HTML display.
Base64 Encoder & Decoder
Convert text or files to Base64 encoding or decode Base64 strings. Supports standard and URL-safe Base64 variants.
Phonetic Alphabet Converter
Convert text to NATO phonetic alphabet (Alpha, Bravo, Charlie) or decode phonetic words back to letters. Perfect for clear communication.
Formatters
Beautify or minify JSON, JavaScript, HTML, CSS, and SQL
JSON Formatter
Beautify minified JSON for readability or minify JSON to reduce file size. Includes syntax validation and custom indentation options.
JavaScript Formatter
Format and beautify JavaScript code or minify it for production. Preserves strings and regex while handling comments.
HTML Formatter
Beautify HTML markup for better readability or minify for smaller file sizes. Preserves content in pre, code, and script tags.
XML Formatter
Format XML documents with proper indentation or minify for compact output. Validates XML syntax and preserves CDATA sections.
CSS Formatter
Beautify CSS stylesheets for development or minify for production. Supports modern CSS features including variables and media queries.
SQL Formatter
Format and beautify SQL queries for better readability. Supports multiple SQL dialects including MySQL, PostgreSQL, and SQL Server.
Markdown Preview
Write Markdown with live preview and embedded Mermaid diagrams. Create flowcharts, sequence diagrams, and more. Export to PDF, PNG, or JPG.
Analysis
Extract metadata and analyze files in depth
File Metadata Extractor
Extract comprehensive metadata from any file type. Powered by ExifTool, supporting 100+ metadata formats including EXIF, XMP, IPTC, GPS coordinates, and more.
Private Text Analyzer
Analyze text for word count, readability scores, hidden characters, Unicode issues, and AI writing patterns. 100% client-side - your text never leaves your browser.
Humanize AI Text
Detect AI writing patterns with color-coded highlighting, then rewrite text to sound naturally human. Supports rich text paste from Word and Google Docs.
Prompt Enhancer
Transform basic prompts into structured, high-precision AI instructions. Choose from 5 professional frameworks: OCEAN, RISEN, CO-STAR, RTF, and OCEAN-RPi.
Assessment
Evaluate your readiness for cloud, containers, and AI adoption
AI Readiness Assessment
Evaluate your organization's readiness to adopt AI. Get a maturity score, identify gaps across 7 dimensions, and receive actionable recommendations for quick wins and foundational improvements.
Serverless Readiness Checker
Evaluate if your workload is a good fit for serverless architecture. Answer 8 questions and get personalized recommendations, architecture patterns, and AI prompts.
Containerization Readiness Checker
Evaluate if containerization makes sense for your application. Answer 8 questions and get an honest assessment, effort estimates, and actionable recommendations.
Cloud Migration Readiness Checker
Evaluate if your organization is ready to migrate to the cloud. Answer 10 questions and get migration risks, complexity estimates, and provider-specific recommendations.
Kubernetes Readiness Checker
Evaluate if Kubernetes is the right choice for your organization. Answer 9 questions and get an honest assessment with alternative platform recommendations.
BPA Opportunity Finder
Discover high-ROI automation opportunities in your business. Analyze processes across Finance, HR, Support, Sales, and Operations. Get a prioritized roadmap with workflow, RPA, AI, and API recommendations.
Built for Developers
Why Use Our Tools?
Most tools run entirely in your browser with no data sent to servers. Tools that require backend processing (like SSL scans) only send the minimum data needed.
Privacy First
Most tools process data entirely in your browser. Tools requiring server processing send only what's needed - never stored, never shared.
Lightning Fast
No server round-trips. No loading spinners. Get instant results as you type or paste your content.
Always Free
No sign-up required. No usage limits. No ads. Just free, high-quality tools for developers.
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