▸_ffmpegtool
ffmpeg.wasm · 100% local processing

FFmpeg
in your browser.

FFmpegTool is a browser-based toolbox for video, audio, and images: trim, compress, convert, GIF, watermark, frame extract. All processing happens on your device — your files never leave it, even when you go offline. Your files never leave your device.

Browse all toolsCommand Lab
16+tools0bytes uploaded100%free, no watermark
ffmpeg.wasm — local execution
$ ffmpeg -i demo.mov -c:v libx264 -crf 28 -preset fast web.mp4
frame=  842 fps= 61 time=00:00:33.7 speed=2.17x
██████████████████████████ 100%
✓ Done — file generated locally
38.2 MB → 9.4 MB (size -75%)
Output 9.4 MB · 0 bytes uploaded
WebAssembly · Multithreaded0 bytes uploaded
MP4/MOV/MKV/WEBM/AVI/MP3/AAC/FLAC/WAV/GIF/APNG/WEBP/AVIF/PNG/JPG/
MP4/MOV/MKV/WEBM/AVI/MP3/AAC/FLAC/WAV/GIF/APNG/WEBP/AVIF/PNG/JPG/
toolbox

One toolbox for
your entire media workflow.

16 tools covering video, audio, GIF, and image. The command on every card is the actual FFmpeg parameter it runs.

why ffmpegtool

Uploading files to process media
was nevernecessary.

01

Local-first, private by default

FFmpeg runs inside your browser sandbox. Your media files never leave your device — disconnect the internet and it still works.

02

Free, no watermark, no limits

Every tool is free to use. No watermarks, no sign-up, no usage limits.

03

Pro controls, fully exposed

Real FFmpeg under the hood. Encoder, bitrate, CRF, filters — every option is visible, tweakable, and copy-worthy.

ffmpeg playground

Command Lab:
write FFmpeg, run it now.

No environment setup, no PATH config. Drop a file, type any FFmpeg command, and run it in your browser with live logs and downloadable output. Learn commands, tune parameters, test ideas — all here.

Open the LabReal execution · files stay in browser
ffmpeg-command — live
$ ffmpeg -i input.mp4 -vf "hflip,eq=saturation=1.4" out.mp4
# horizontal flip + boost saturation
# drop a file and run, logs stream live
$
blog

Master FFmpeg.

All articles
Encoding2026-08-24 · 6 min

CRF Explained: Video Compression Quality Guide

Same -crf flag, so why does one video come out at 200 MB and another at 100? Starting from x264’s rate-control model, this guide explains CRF all the way through — and ends with a cheat sheet you can copy as-is.

Read more
WASM2026-08-10 · 10 min

Running FFmpeg in the Browser with WebAssembly

ffmpeg.wasm loading strategies, SharedArrayBuffer cross-origin isolation, memory management for large files — everything we learned taking a 30 MB core from “it runs” to “it’s usable.”

Read more
Filters2026-07-28 · 8 min

FFmpeg filter_complex: A Beginner’s Guide

Scale, watermark, and tile video in a single command. A diagram-first guide to filter chains vs. filter graphs — read it once and you’ll be writing your own compound commands.

Read more
faq

FAQs.

What is FFmpegTool??

FFmpegTool brings FFmpeg to your browser as a free suite of browser-based tools — trim, convert, merge, and compress video and audio, extract frames, add watermarks, and compress and edit images — all powered by FFmpeg compiled to WebAssembly.

Do I need to install FFmpeg to use it??

No. FFmpegTool runs FFmpeg entirely in your browser as an online FFmpeg tool, so there is no need to download, install, or configure the FFmpeg command line. Just open the page and start processing — it works on Windows, macOS, and Linux.

Are my files uploaded to a server??

No. Unlike most online FFmpeg tools, FFmpegTool processes files locally in your browser using FFmpeg WASM. Your video, audio, and image files never leave your device, which makes it private and secure, even for sensitive content.

Is FFmpegTool free??

Yes, FFmpegTool is completely free to use with no signup, no watermarks, and no file size limits beyond what your browser can handle. It is a free set of online FFmpeg tools for everyday media processing.

Which FFmpeg tools are included??

FFmpegTool includes online FFmpeg tools for video trimming, video merging, video compression, video-to-GIF, audio extraction, video-to-MP3, audio merging, format conversion (MP4/MKV/WebM/MP3/AAC/WAV and more), frame extraction, and watermarking, plus browser-based image compression and editing tools.