BrowseryTools

A comprehensive collection of 152 browser-based tools built with Next.js, TypeScript, and Tailwind CSS. Your files and text are processed in your browser — no uploads, no accounts required. Includes on-device AI tools (transcription, translation, summarization, image upscaling, and more) powered by Transformers.js.

Free, no accounts, no ads, no tracking. If it saves you time, star the repo. That is the fastest way to help other people find it.

Two caveats worth stating plainly, since "everything is local" is the headline claim:

• Tools that run an AI model download the model weights from a third-party CDN the first time you use them. Your content still stays on your device; the model files come over the network.
• Two tools genuinely need the network. Live Dictation uses the browser's Web Speech API, which in Chrome and Edge sends your audio to the browser vendor for recognition — don't use it for anything confidential. Currency Converter fetches exchange rates from an external API.

📚 Table of Contents

• Features
• Tech Stack
• Supported Languages
• Prerequisites
• Getting Started
• Running Tests
• Project Structure
• Contributing
• Contributors
• Activity
• Reporting Issues
• Supporting the Project
• Star History
• License
• Contact

🚀 Features

🖼️ Image Tools

• Background Removal: Remove background from your images instantly using AI.
• Phone Mockups: Place screenshots into iPhone/Android device frames.
• Image Compression: Compress images to reduce file size while maintaining quality.
• Format Converter: Convert images between different formats like JPG, PNG, WebP, GIF, BMP, TIFF, and SVG.
• Color Correction: Adjust colors, brightness, contrast, saturation, and hue in images.
• SVG Tools: Edit and manipulate SVG vector graphics.
• SVG to PNG: Convert SVG vector files to PNG images.
• Photo Censor: Redact sensitive parts of an image with blur, pixelate, or black-box censoring.
• Screenshot Beautifier: Turn plain screenshots into beautiful images.
• Meme Generator: Make a meme online for free.
• Photo Collage: Combine multiple photos into a collage with grid, strip, and mosaic layouts.
• EXIF Remover: Strip EXIF metadata - GPS location, camera model, timestamps - from photos before sharing.
• ASCII Art Generator: Convert any image into ASCII art in your browser.
• Image Upscaler: Upscale and enhance images 2x with an on-device AI super-resolution model.
• Image Captioner: Generate a descriptive caption and ready-to-use alt text for any image with an on-device AI model.
• Depth Map Generator: Generate a depth map from any image with an on-device AI model.
• Object Cutout: Cut out any object from an image with one click using the Segment Anything (SAM) AI model in your browser.
• Image Resizer: Resize images to exact dimensions or by percentage.
• EXIF Viewer: View EXIF metadata from photos: camera model, lens, aperture, shutter speed, ISO, GPS coordinates, and more.
• Favicon Generator: Create a complete favicon set from an image or a letter/emoji.
• Crop Image: Crop images online with aspect-ratio presets and precise drag handles.
• Watermark Image: Add text or logo watermarks to photos — position, opacity, rotation, and tiling.

🤖 AI Tools

• Token Counter: Count tokens for any text across popular AI models: GPT-4o, Claude, Llama 3, and more.
• Context Window Calculator: Calculate how much of a model's context window your text uses.
• AI Cost Calculator: Estimate your AI API costs by entering token counts and selecting a model.
• Model Comparison: Compare AI language models side by side: context window size, pricing, capabilities, speed, and provider.
• System Prompt Builder: Build structured system prompts for AI models using a guided form.
• Prompt Library: Save, organize, and search your AI prompts locally in the browser.
• CLAUDE.md Generator: Generate CLAUDE.md files for your projects using a structured form.
• AI Rules Generator: Generate .cursorrules, .windsurfrules, and GitHub Copilot instruction files for your IDE.
• JSON Schema Builder: Build JSON schemas for LLM tool calls and function calling using a visual form.
• MCP Config Generator: Generate Model Context Protocol (MCP) configuration files for Claude Desktop and other MCP clients.
• Prompt Formatter: Convert prompts between different AI formats: ChatML, Llama 3 Instruct, Claude XML tags, and plain text.
• Skill / Agent Builder: Scaffold AI agent skill files with a guided form.
• AI Instruction Diff: Compare two system prompts, CLAUDE.md files, or AI instruction sets side by side.
• Text Similarity: Measure semantic similarity between texts using TF-IDF cosine similarity, all in the browser.
• Sentiment Analyzer: Detect positive or negative sentiment in text with an on-device AI model.
• Audio/Video Transcriber: Transcribe audio or video to text and generate SRT/VTT subtitles with on-device Whisper AI.
• Text Summarizer: Summarize long text into a short summary with an on-device AI model.
• Translator: Translate text between 15 languages fully on-device with an AI model.
• PII Detector & Redactor: Detect and redact personal info - names, emails, phone numbers, locations, credit cards, IPs - with an on-device AI model.
• Zero-Shot Text Classifier: Classify any text into your own custom labels with an on-device AI model.

📁 File Tools

• PDF Tools: Merge PDFs, split or extract pages, and turn images into a PDF.
• Zip Tools: Create ZIP archives from your files and extract existing ones.
• CSV/Excel Viewer: View CSV and Excel files in your browser: sort, search, chart a column, and export to CSV.
• Data Format Converter: Convert data between CSV, TSV, JSON, XML, and YAML.
• PDF to Word: Convert a PDF into an editable Word (.docx) document — headings, paragraphs, lists, and tables — entirely in your browser.
• Word to PDF: Convert a Word (.docx) document into a PDF via your browser's print dialog — text stays selectable and searchable.

🎵 Media Tools

• Video Editor: Trim video clips and turn them into animated GIFs.
• Audio Editor: Play audio files with adjustable volume and speed, view the waveform, and download your file.
• Mic & Camera Tester: Check your camera preview and test microphone input levels with a live meter.
• Compress Video: Compress videos in your browser using ffmpeg.wasm.
• Screen Recorder: Record your screen, window, or tab directly in the browser using the Screen Capture API.
• GIF Maker: Turn a series of images into an animated GIF. Reorder frames, set speed, loop, and resize.
• Subtitle Studio: Transcribe a video into word-timed subtitles with an on-device Whisper model, style the captions, and burn them into your video.
• Video to Audio: Extract audio from videos in your browser — MP3, M4A, OGG, or WAV out, with batch conversion, bitrate control, and optional trimming.

📝 Text & Language Tools

• Text Case Converter: Convert text between different cases: uppercase, lowercase, title case, camelCase, snake_case, and more.
• Text Counter: Count words, characters, lines, and paragraphs in text.
• Rich Editor: Edit and preview rich text documents with formatting options.
• Lorem Ipsum Generator: Generate placeholder text for designs and mockups.
• Text Diff Viewer: Compare two texts and copy a simple patch.
• Markdown Editor: Write Markdown with a live split-pane preview.
• Notepad: A distraction-free scratch pad that saves your notes automatically to the browser.
• Text Sorter: Sort lines of text alphabetically, by length, or numerically.
• Word Frequency Analyzer: Analyze word frequency in any text.
• Markdown to HTML: Convert Markdown to clean HTML instantly.
• Text Repeater: Repeat any text or character N times with a custom separator.
• Markdown Table Generator: Build tables in a visual grid editor and export as valid Markdown table syntax.
• Image to Text (OCR): Extract text from images for free with on-device OCR.
• Text to Speech: Read text aloud in your browser for free.
• Live Dictation (mic): Convert speech to text online for free.
• Word Unscrambler: Unscramble letters into valid words. Filter by minimum length or a required letter, and browse matches grouped by word length.
• Wordle Solver: Solve Wordle puzzles fast. Mark each tile gray, yellow, or green and instantly see every valid candidate word.
• Anagram Solver: Find every anagram of a set of letters. Optionally include shorter sub-anagrams, grouped by word length.

📊 Data Tools

• JSON to CSV: Convert JSON data to CSV format for spreadsheet applications.
• Base64 Tools: Encode or decode Base64 strings and files.
• QR Code Generator: Generate QR codes from text, URLs, contact information, and more.
• Barcode Generator: Generate various barcode types including CODE128, EAN-13, UPC-A, CODE39, and more.
• QR Code Scanner: Scan QR codes using your camera or upload an image.
• Barcode Scanner: Scan barcodes using your camera or upload an image.
• Charts: Create beautiful, customizable charts with full control over every detail.
• YAML ↔ JSON: Convert between YAML and JSON formats instantly.
• URL Encoder/Decoder: Encode or decode URLs and query strings.
• Fake Data Generator: Generate realistic fake data for testing and prototyping.
• Text to Binary: Convert text to binary, hexadecimal, octal, and decimal representations.
• JSON → TypeScript: Paste JSON and instantly get TypeScript interfaces.
• Mermaid Diagram Viewer: Write Mermaid markdown and see your diagram rendered live.
• Morse Code Converter: Convert text to Morse code and decode Morse code back to text.

🧮 Math & Finance Tools

• Unit Converter: Convert between different units of measurement including length, weight, temperature, area, volume, and more.
• Time Zone Converter: Convert times between different time zones.
• Calculator: Advanced calculator with basic, scientific, and graphing modes.
• Age Calculator: Calculate your exact age in years, months, and days.
• Number Base Converter: Convert between binary, octal, decimal and hexadecimal with live validation.
• Currency Converter: Convert between all major currencies in the browser using cached daily rates and animated number display.
• Loan Calculator: Calculate monthly payments, total interest, and amortization schedules for mortgages and loans.
• Percentage Calculator: Calculate percentages, percentage change, percentage of a number, and reverse percentages.
• Aspect Ratio Calculator: Calculate and lock aspect ratios for images and videos.
• BMI Calculator: Calculate Body Mass Index (BMI) in metric or imperial units.
• Tip Calculator: Calculate tips and split bills between multiple people.
• Roman Numeral Converter: Convert numbers to Roman numerals and Roman numerals back to numbers.

⚡ Productivity Tools

• Todo List: Organize your tasks and stay productive.
• Timer & Countdown: Simple timer and countdown with fullscreen mode and completion sound.
• Pomodoro Timer: Boost focus with the Pomodoro Technique.
• World Clock: View current time in multiple cities and time zones simultaneously.
• Stopwatch: Precise stopwatch with lap times and split tracking.
• Habit Tracker: Track daily habits and build streaks.
• Keep Awake: Prevent your laptop or phone from sleeping.
• Random Picker: Generate random numbers, roll dice, flip a coin, or pick a random winner from a list.
• Mind Map Maker: Create interactive mind maps in your browser.
• Signature Maker: Create an online signature: draw it freehand with adjustable pen color and thickness, or type your name in a handwriting font.

🧑‍💻 Developer Tools

• UUID Generator: Generate Universally Unique Identifiers (UUIDs) in different versions and