Browser Tools (113)

Remove image backgrounds privately — your photos never leave your device. An on-device AI model runs entirely in your browser, so no files are uploaded to any server. Perfect for product photos, portraits, and graphics. Supports PNG, JPG, and WebP. No watermark, no signup, completely free.

Place screenshots into iPhone/Android device frames. Upload a screenshot, choose a frame, adjust fit, background, and export.

Compress images locally in your browser — zero uploads, zero server processing, 100% private. Reduce JPG, PNG, and WebP file sizes by up to 90% using client-side canvas algorithms. Perfect for web optimization, email attachments, and confidential photos you can't risk uploading to a cloud.

Convert images between different formats like JPG, PNG, WebP, GIF, BMP, TIFF, and SVG. Batch conversion supported. Optimize for web or print.

Adjust colors, brightness, contrast, saturation, and hue in images. Enhance photos, fix lighting issues, and create artistic effects. Works with all image formats.

Edit and manipulate SVG vector graphics. Scale, modify colors, optimize paths, and convert to other formats. Ideal for logos, icons, and scalable graphics.

Convert between HEX, RGB, and HSL with live preview.

Combine multiple PDF files into one

Extract specific pages from a PDF

Reduce PDF file size

Rotate all PDF pages

Convert PDF pages to JPEGs inside ZIP

Extract text blocks from PDF

Compile images into single PDF

Compile raw text to PDF

Compress files into a ZIP archive

Extract files from a ZIP archive

View and edit CSV and Excel files in your browser. Sort, filter, and analyze data. Export to different formats. No software installation required.

Convert files between different formats including documents, images, audio, and video. Supports hundreds of file types with high-quality conversion.

Trim, convert, and edit video files. Cut clips, merge videos, adjust quality, and convert between formats. Works with MP4, AVI, MOV, and more.

Edit and process audio files. Trim, merge, convert formats, adjust volume, and apply effects. Supports MP3, WAV, FLAC, and other audio formats.

Check your camera preview and test microphone input levels with a live meter.

Compress video files to reduce size while maintaining quality. Reduce MP4 and WebM file sizes with browser-based FFmpeg — no uploads needed.

Convert text between different cases: uppercase, lowercase, title case, camelCase, snake_case, and more. Perfect for coding and content formatting.

Count words, characters, lines, and paragraphs in text. Analyze readability, estimate reading time, and get detailed statistics for content analysis.

Format and beautify your code with proper indentation and syntax highlighting. Supports JavaScript, Python, HTML, CSS, JSON, and many more languages.

Edit and preview rich text documents with formatting options. Create documents with bold, italic, lists, links, and more. Export to HTML or Markdown.

Generate placeholder text for designs and mockups. Customize length, paragraphs, and format. Perfect for web design, presentations, and prototyping.

Measure your typing speed (WPM) and accuracy with optional mechanical keyboard click sounds.

Compare two texts and copy a simple patch.

Write Markdown with a live split-pane preview. Supports GFM tables, code blocks, and task lists. Export as Markdown or HTML.

Format, prettify, or minify HTML code. Automatically indents tags, fixes nesting, and removes whitespace for production builds.

A distraction-free scratch pad that saves your notes automatically to the browser. Supports multiple notes with titles and timestamps.

Sort lines of text alphabetically, by length, or numerically. Remove duplicates, reverse order, shuffle randomly, and trim whitespace.

Convert text to Morse code and decode Morse code back to text. Supports all letters, numbers, and punctuation. Copy or play audio beeps.

Analyze word frequency in any text. Find the most common words, filter stop words, and export results as CSV. Useful for SEO and writing analysis.

Convert Markdown to clean HTML instantly. Supports GFM tables, task lists, code blocks, and more. Copy the HTML output or download as a file.

Repeat any text or character N times with a custom separator. Useful for generating test data, placeholder content, and patterns.

Build tables in a visual grid editor and export as valid Markdown table syntax. Control column alignment per column.

Convert JSON data to CSV format for spreadsheet applications. Handle nested objects, arrays, and complex data structures. Perfect for data analysis and reporting.

Encode and decode Base64 strings and files entirely in your browser — nothing is sent to a server. Uses the native btoa/atob browser APIs so your binary data, images, and secrets stay local. Essential for web development, API debugging, and safely encoding credentials without log exposure.

Generate QR codes from text, URLs, contact information, and more. Customize colors, size, and error correction. Download as PNG, SVG, or PDF.

Generate various barcode types including CODE128, EAN-13, UPC-A, CODE39, and more. Customize appearance and download as PNG. Perfect for inventory, retail, and logistics.

Scan QR codes using your camera or upload an image. Get instant results with copy and download options. Perfect for quickly accessing URLs, contact info, and other QR data.

Scan barcodes using your camera or upload an image. Supports multiple barcode formats including EAN-13, UPC-A, CODE128, and more. Get instant results with validation.

Create beautiful, customizable charts with full control over every detail. Support for area, bar, line, pie, radar, and radial charts with multiple export options.

Format, validate, and minify JSON offline — safe to use with API keys, credentials, and secrets. All parsing runs in local JavaScript, so your JSON payload is never sent to any server or logged. Pretty-print with syntax highlighting, detect errors, sort keys, and minify for production.

Convert between YAML and JSON formats instantly. Validate syntax, format output, and switch between human-readable YAML and machine-readable JSON.

Encode or decode URLs and query strings. Percent-encode special characters and decode percent-encoded strings. Essential for web developers and API debugging.

Generate realistic fake data for testing and prototyping. Names, emails, addresses, phone numbers, credit cards, UUIDs, and more. Export as JSON or CSV.

Convert text to binary, hexadecimal, octal, and decimal representations. Decode binary/hex back to text. Useful for encoding, security, and low-level programming.

Paste JSON and instantly get TypeScript interfaces. Handles nested objects, arrays, optional fields, and union types.

Write Mermaid markdown and see your diagram rendered live. Supports flowcharts, sequence diagrams, ER diagrams, and more.

Create professional invoices with customizable templates, automatic tax calculations, and PDF export. Perfect for freelancers, small businesses, and contractors.

Convert between different units of measurement including length, weight, temperature, area, volume, and more. Supports metric, imperial, and scientific units.

Convert times between different time zones. View current times worldwide and convert specific dates and times. Perfect for scheduling and international communication.

Advanced calculator with both basic and scientific modes. Perform arithmetic operations, trigonometric functions, logarithms, memory operations, and more. Full keyboard support included.

Calculate your exact age in years, months, and days. Compare ages between two people and get detailed age information including zodiac signs and next birthday.

Convert between binary, octal, decimal and hexadecimal with live validation.

Track your expenses with detailed categorization, budget management, and comprehensive reports. Visualize spending patterns with interactive charts and export data for analysis.

Convert between all major currencies in the browser using cached daily rates and animated number display.

Calculate monthly payments, total interest, and amortization schedules for mortgages and loans. Visualize payment breakdown with an interactive chart.

Calculate percentages, percentage change, percentage of a number, and reverse percentages. Multiple calculation modes for everyday math needs.

Calculate and lock aspect ratios for images and videos. Find the missing dimension, compare ratios, and get pixel dimensions for common screen sizes.

Calculate Body Mass Index (BMI) in metric or imperial units. Shows BMI category, healthy weight range, and visual gauge.

Calculate tips and split bills between multiple people. Choose tip percentage or enter custom amount. Shows per-person totals.

Organize your tasks and stay productive. Create, manage, and track your todos with priority levels. Mark tasks as completed and keep your workflow organized.

Simple timer and countdown with fullscreen mode and completion sound. Perfect for work sessions, workouts, cooking, and presentations.

Boost focus with the Pomodoro Technique. 25-minute work sessions with 5-minute short breaks and 15-minute long breaks. Tracks sessions and plays sounds.

View current time in multiple cities and time zones simultaneously. Add your favorite cities, compare times, and see which ones overlap during business hours.

Precise stopwatch with lap times and split tracking. Start, stop, reset, and record laps. Export lap history as CSV.

Track daily habits and build streaks. Add custom habits, mark them complete each day, and view your streak and completion history. All stored locally.

Prevent your laptop or phone from sleeping. Choose a duration — 15 minutes, an hour, all day — or stay awake indefinitely. Uses the Screen Wake Lock API, works on Mac, Windows, Linux, iOS and Android. No install, no accounts.

Generate Universally Unique Identifiers (UUIDs) in different versions and formats. Perfect for database keys, API identifiers, and unique references.

Decode JSON Web Tokens (JWTs) securely — your tokens are never sent to any server. Unlike jwt.io, BigWow parses JWTs entirely in your browser using local Base64 URL decoding, so your auth credentials, session tokens, and user claims stay private. View header, payload, expiry, and signature locally.

Generate cryptographically secure passwords locally — nothing is ever transmitted to a server. Uses the browser's Crypto.getRandomValues() API so your generated passwords are provably random and completely private. Set length, character types, and special requirements. No account needed.

Generate cryptographic hashes privately in your browser — your input text is never sent to a server. Uses the Web Crypto API (SubtleCrypto) for SHA-256, SHA-384, SHA-512, and MD5. Perfect for verifying data integrity, generating checksums, and hashing sensitive strings without network exposure.

Epoch seconds/milliseconds ↔ human date with timezone.

Test regular expressions privately — your input text and patterns are never sent to a server. Unlike Regex101, BigWow runs all matching locally using the browser's native JavaScript RegExp engine. Safe to test against log snippets, emails, tokens, or any sensitive text data.

Explain cron expressions and list next runs.

Analyze the strength of any password in real time. Checks entropy, character variety, common patterns, and dictionary words. All analysis runs locally.

Encrypt and decrypt text with AES-256-GCM entirely in your browser — no data ever touches a server. Powered by the Web Crypto API so your plaintext and keys are processed exclusively in local memory. Use a passphrase or generate a random key. Zero cloud storage, zero third-party exposure.

Quick reference for all HTTP status codes with descriptions, use cases, and examples. Search by code number or keyword. Covers 1xx through 5xx.

Minify or beautify CSS code. Remove comments and whitespace for production, or prettify minified CSS for debugging. Shows size reduction percentage.

Format and beautify SQL queries with proper indentation and keyword casing. Supports SELECT, INSERT, UPDATE, DELETE, CREATE, and more.

Calculate Unix file permissions visually. Toggle read/write/execute bits for owner, group, and others to get the octal value and chmod command.

Generate HTML meta tags, Open Graph tags, and Twitter Card tags. Preview how your page will appear in search results and social media.

Create beautiful CSS gradients visually. Add color stops, control angles and positions, and copy the generated CSS. Supports linear, radial, and conic gradients.

Generate harmonious color palettes from a base color. Explore complementary, triadic, analogous, and split-complementary schemes. Export as CSS variables or JSON.

Resize images to exact dimensions or by percentage. Lock aspect ratio, choose output format, and adjust quality. No file size limits, runs fully in browser.

Record your screen, window, or tab directly in the browser using the Screen Capture API. No extensions or software needed. Save as WebM video.

Check color contrast ratios for WCAG accessibility compliance. Enter foreground and background colors to get AA and AAA pass/fail results for normal and large text.

Simulate how images appear to people with different types of color blindness: deuteranopia, protanopia, tritanopia, and achromatopsia.

View EXIF metadata from photos: camera model, lens, aperture, shutter speed, ISO, GPS coordinates, and more. No upload — processed locally.

Browse and search all Unicode emojis by name or category. Click to copy to clipboard. Filter by skin tone and find emoji codes.

Build CSS box shadows visually with sliders for offset, blur, spread, color, and opacity. Supports multiple shadow layers.

Upscale and enhance images in-browser using local AI models. Boost resolution up to 4x, denoise, and optimize details. 100% private, runs entirely on your device.

Count tokens for any text across popular AI models: GPT-4o, Claude, Llama 3, and more. Instantly see token usage before sending to an API. No API key needed.

Calculate how much of a model's context window your text uses. See tokens used, percentage filled, tokens remaining, and estimated API cost for major models.

Estimate your AI API costs by entering token counts and selecting a model. Supports GPT-4o, Claude 3.5, Gemini, Llama, and more with up-to-date pricing.

Compare AI language models side by side: context window size, pricing, capabilities, speed, and provider. Filter and sort to find the best model for your use case.

Build structured system prompts for AI models using a guided form. Set role, tone, constraints, output format, and examples. Export as plain text or Claude XML tags.

Save, organize, and search your AI prompts locally in the browser. Tag prompts by category, copy with one click, and export or import your entire library as JSON.

Generate CLAUDE.md files for your projects using a structured form. Define tech stack, conventions, commands, do/don't rules, and coding standards. Copy or download.

Generate .cursorrules, .windsurfrules, and GitHub Copilot instruction files for your IDE. Fill in your stack and preferences, get a ready-to-use AI rules file.

Build JSON schemas for LLM tool calls and function calling using a visual form. Outputs OpenAI and Anthropic tool format. Perfect for structured AI output definitions.

Generate Model Context Protocol (MCP) configuration files for Claude Desktop and other MCP clients. Add servers, configure transports, and export valid JSON config.

Convert prompts between different AI formats: ChatML, Llama 3 Instruct, Claude XML tags, and plain text. Preview the formatted output instantly.

Scaffold AI agent skill files with a guided form. Set name, description, trigger phrases, and instructions. Outputs a ready-to-use YAML/Markdown skill file.

Compare two system prompts, CLAUDE.md files, or AI instruction sets side by side. Highlights additions, deletions, and changes to track prompt evolution.

Measure semantic similarity between texts using TF-IDF cosine similarity, all in the browser. Useful for comparing prompts, outputs, or any text pairs.

Download YouTube videos and audio tracks for free. Supports 1080p, 720p, 480p quality and audio-only MP3 extraction. Powered by the open-source Cobalt engine. No account needed.

Download TikTok videos without watermark. Save TikTok clips in full quality directly to your device. Optionally remove the TikTok watermark. Powered by Cobalt.

Download Instagram Reels, videos, and stories from public accounts. Save content as MP4 or audio. Paste the post URL and download instantly. Powered by Cobalt.

Download videos from Twitter (X) tweets. Paste any public tweet URL and save the embedded video at the best available quality. No login required. Powered by Cobalt.

Download Reddit videos and GIFs from public posts. Supports v.redd.it hosted videos and external links. Paste the post URL and grab the video. Powered by Cobalt.

Download SoundCloud tracks as MP3 audio files. Paste any public SoundCloud track URL and save the audio instantly to your device. Powered by Cobalt.

All-in-one media downloader supporting YouTube, TikTok, Instagram, Twitter, Reddit, SoundCloud, and more. Paste any supported URL to download video or audio. Powered by Cobalt.

Download HLS (.m3u8) video streams and merge segments into a single MP4 file directly in your browser. No software installation required.

Fetch and download YouTube video thumbnails in all available sizes: maxresdefault, hqdefault, mqdefault, and sddefault. Paste a YouTube URL or video ID.

Extract individual frames from any video file. Seek to specific timestamps and save frames as PNG or JPG images, all processed locally in your browser.