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1000+ Free Browser Tools — PDFs, images, video, audio & more.

Compress PDFs, reorder pages, resize images, convert files — every tool runs directly in your browser using open web technology.

PDF Tools

Compress, merge, split, convert, and edit PDF files in your browser

Image Tools

Resize, compress, convert, edit images and create/edit GIFs instantly

Video Tools

Trim, convert, compress, and edit video files in your browser

Compress Video

Reduce video file size while preserving quality. 100% browser-based — your video never leaves your device.

AI Subtitle Generator

Generate accurate .srt subtitles from any video. Whisper.cpp transcribes the audio entirely in your browser and outputs a timestamped subtitle file ready to drop into your editor.

Convert Video

Convert videos between MP4, WebM, MOV, MKV, and animated GIF — entirely in your browser. Your file never leaves your device.

Video to MP3

Extract the audio from any video as an MP3 file — entirely in your browser. Pick bitrate and channels, then download the result. Files are processed locally with FFmpeg WebAssembly.

Video Trimmer

Set precise in and out timestamps, snap to keyframes when needed, and document handles for social-safe cutdowns.

Video to GIF

Convert any video clip to an animated GIF entirely in your browser. Pick the start, length, frame rate, and width — your file is processed locally with FFmpeg WebAssembly and never uploaded.

MOV to MP4

Convert QuickTime MOV files to MP4 in your browser. Choose Fast (instant remux, zero quality loss) or Re-encode (universal compatibility) — files are processed locally with FFmpeg WASM.

Add Subtitles to Video

Burn an SRT or ASS subtitle file directly into your video frames so the captions show in every player. Files are processed entirely in your browser with FFmpeg WebAssembly.

Subtitle Editor

Open a .srt or .vtt subtitle file and shift timestamps, scale playback speed, find/replace text, strip styling, or convert between formats. Pairs with the AI Subtitle Generator for a complete subtitle workflow.

Audio Tools

Trim, convert, compress, and analyze audio files in your browser

AI Audio Transcriber

Transcribe any audio file to text in your browser. Whisper.cpp recognises 99 languages and exports a clean .txt or timestamped transcript without uploading the recording.

Convert Audio

Convert any audio file between MP3, WAV, OGG, FLAC, M4A, AAC, and Opus right in your browser. Pick the output format and (for lossy formats) the target bitrate. Everything runs locally with FFmpeg WebAssembly — your file is never uploaded and no account is required.

Compress Audio

Shrink any audio file to a smaller size by lowering the bitrate. Pick a target quality (96, 128, 192, 256, or 320 Kbps) or output format (MP3, OGG, M4A) and the file is re-encoded right inside your browser using FFmpeg WebAssembly. Nothing is uploaded — your audio never leaves your device.

MP3 to WAV

Convert an MP3 file to a lossless WAV file. The decoded PCM audio is wrapped in a standard 16-bit WAV container — perfect for importing into any desktop audio editor or DAW for further processing. Runs entirely in your browser with FFmpeg WebAssembly.

LUFS Loudness Normalizer

Normalize an audio file to a specific integrated loudness target (e.g. -16 LUFS for podcast distribution, -14 LUFS for Spotify) using the ITU-R BS.1770 measurement standard.

Audio Trimmer

Trim any audio file to a precise start and end time. Outputs a lossless stream-copy by default (no quality loss, very fast) or re-encodes to MP3, WAV, OGG, or M4A. Files are processed entirely in your browser with FFmpeg WebAssembly.

WAV to MP3

Compress a large WAV file into a much smaller MP3 with selectable bitrate (96, 128, 192, 256, or 320 kbps). Perfect for sharing recordings online, attaching to emails, or freeing up disk space. Runs entirely in your browser with FFmpeg WebAssembly.

Audio Chapter Editor

Add, edit and remove podcast chapter markers in any audio file. Outputs an industry-standard ID3v2 chapter frame compatible with Apple Podcasts, Pocket Casts, Overcast and every modern podcast app.

Audio Fade

Apply a smooth fade-in to the start and/or fade-out to the end of any audio file. Pick the fade duration in seconds. Perfect for polishing intros and outros, smoothing over hard cuts, and creating gentle transitions for podcasts and music.

Text Tools

Count words, convert case, compare text, encode, format, and more

Calculators

Finance, health, math, science, education, construction, and unit conversions

Developer Tools

JSON, APIs, code generators, database tools, security, and more

Web & Utility

SEO tools, email utilities, social media helpers, browser info, and more

Popular recipes

One-click pipelines that chain multiple tools end-to-end. Drop in one file or a whole batch.

Why Favtoo?

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Private by Design

Every tool runs locally in your browser using WebAssembly and Canvas APIs. The processing happens entirely on your device.

Instant Processing

Tools run directly in your browser, so results appear in seconds — limited only by your device's CPU.

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Free To Use

Every tool runs on your device using open web technology, so processing power comes from your hardware rather than ours.