Video & Audio
A full FFmpeg build compiled to WebAssembly: convert video and audio, trim clips, make GIFs and extract soundtracks locally.
43 tools, all running in your browser.
Fig 1 Frames, counted on the bench
Move across to jog the film · ← →
Video tools here work like this table: frames pass the head one at a time on your own machine. The counter is frames; the time is frames ÷ 24.
Most used
MP4 to MP3 Extract the soundtrack from MP4 video as an MP3 at up to 320 kbps. Queue as many files as you like — every one is decoded on your own device. Screen Recorder Record a screen, window or tab with microphone and system audio. No watermark, no time limit, no account — the video never leaves your computer. Video Converter Convert MP4, WebM, MKV, MOV and AVI video to MP4 (H.264), WebM (VP8) or GIF with quality and resolution presets. Private, no upload. Video to GIF Turn any clip into a sharp animated GIF: pick the range, frame rate and width, with a two-pass palette for accurate colour. All local. Video to MP3 Pull the soundtrack out of any video and save it as MP3 with a bitrate you choose. Optional trim, instant preview, nothing uploaded.
Everything else
AAC to MP3 Converter Convert raw AAC or .aac audio to MP3 with a bitrate selector and batch queue. Runs on your device, so large files are never rejected. AMR to MP3 Converter Convert AMR call and voice recordings from older phones into MP3 you can actually play. Batch queue, entirely inside your browser. Audio Converter Convert between MP3, WAV, OGG, M4A and FLAC with bitrate, sample-rate and channel control plus optional loudness normalisation. Fully local. Audio Joiner Merge MP3, WAV and M4A files into one track. Reorder them, trim each piece on its waveform, add a crossfade — all inside your browser. AVI to MP3 Rip the audio from old AVI video into MP3 with a bitrate selector and a batch queue, entirely inside your browser. No signup, no upload, no cap. AVI to MP4 Modernise old AVI clips into MP4 that plays on any phone or browser. DivX and Xvid are re-encoded to H.264 on your own machine — no upload. Compress GIF Shrink a GIF to an exact KB or MB target. The tool re-encodes locally until it fits, so you get the best quality that still passes the limit. Compress Video Shrink MP4, MOV, MKV and WebM files with H.264 CRF encoding, an estimated output size and real before/after numbers. No upload, no watermark. Crop Video Crop video by dragging a box over the picture, with 9:16, 1:1 and 4:5 presets and one-click black-bar removal. No watermark and no length limit. Extract Audio from Video Lift the soundtrack out of a video without re-encoding it — the original AAC, Opus, MP3 or FLAC stream, copied bit for bit, or converted. FLAC to MP3 Converter Turn lossless FLAC albums into MP3 for phones and car stereos. Batch queue, up to 320 kbps, and nothing ever leaves your computer. Flip Video Mirror a video horizontally or vertically — un-mirror a selfie or webcam clip — and export a clean MP4. Runs entirely on your device, no watermark. GIF Maker Turn photos or frames into an animated GIF. Reorder them, set per-frame delays, preview it live, and export with no watermark or upload. GIF to Frames Explode an animated GIF into numbered PNG or JPEG frames with exact per-frame delays, a contact-sheet preview and one ZIP download. GIF to MP4 Convert a heavy GIF into a small MP4 for Discord, WhatsApp and Twitter, with an optional silent audio track so iOS autoplays it properly. M4A to MP3 Converter Convert M4A voice memos and Apple audio to MP3 in your browser. Batch queue, bitrate control, no upload and no file size limit. Merge Videos Join clips into one video with drag-to-reorder. Matching clips are concatenated losslessly; mismatched ones are normalised. No count or size cap. Microphone Test Check your microphone in seconds: live level meter, device picker and a five-second record-and-playback loop. Nothing is transmitted. MKV to MP3 Pull the audio out of MKV files as MP3 — concerts, lectures, rips and recordings. Batch queue, bitrate control, no size cap, nothing uploaded. MKV to MP4 Convert Matroska MKV files to MP4 for TVs, phones and editors. The streams are usually copied straight across, so even a 4 GB film takes seconds. MOV to MP4 Turn QuickTime MOV files into MP4. When the video is already H.264 it is copied across in seconds with zero quality loss — and never uploaded. MP3 to WAV Converter Decode MP3 to uncompressed WAV at 16, 24 or 32-bit for editing, sampling and DAW import. Batch queue, local, and no size cap. MP4 to MOV Wrap MP4 video in a QuickTime MOV container for Final Cut, iMovie and QuickTime Player. Streams are copied across, so nothing is re-compressed. MP4 to WebM Convert MP4 to WebM with VP8 video and Opus audio for HTML5 video. Encoded by your own CPU — no upload, no queue, no daily limit. Mute Video Strip the sound out of a video without touching the picture. The video stream is copied bit for bit, so it is instant and lossless. OGG to MP3 Converter Convert OGG Vorbis and Opus audio to MP3 locally. Drop a whole folder, pick a bitrate, and download each file or all of them zipped. Online Voice Recorder Record your microphone with a live waveform, pause and resume, and save WebM, MP3 or WAV. No time limit, no account, nothing uploaded. Opus to MP3 Converter Convert Opus files from WhatsApp, Telegram and Discord into MP3 that any player opens. Batch conversion, fully local, no upload. Resize GIF Resize an animated GIF to any width — 128 px emoji, 480 px for docs — rebuilding the palette on every frame so small sizes stay sharp. Resize Video Scale a video to 1080p, 720p, 480p or a custom size with an aspect-ratio lock and letterbox or crop fitting. Runs entirely in your browser. Rotate Video Rotate sideways phone footage 90° or 180°. The instant path just rewrites the rotation flag; the bake-in path redraws every frame. Nothing is uploaded. Trim Audio Cut MP3, WAV, M4A, FLAC and OGG files with a dual-handle slider, exact timecodes, optional fades and a lossless copy mode. No upload. Trim Video Cut a clip out of any video with a dual-handle slider and a live preview. Lossless stream copy or a frame-exact re-encode, all in-browser. Video Speed Changer Speed up or slow down a video from 0.25× to 4×, with a live preview before you commit and pitch-corrected audio. No watermark and no upload. WAV to MP3 Converter Compress huge WAV recordings to MP3 without an upload. See exactly how much smaller each file gets, with no 100 MB cap and no queue. Webcam Test Test your webcam with a live preview, measured frame rate, resolution readout and a snapshot to PNG. No video ever leaves your device. WebM to MP3 Turn WebM video or audio into MP3 for players and car stereos that refuse WebM. Batch convert any number of files locally, with nothing uploaded. WebM to MP4 Convert WebM screen recordings, OBS captures and Discord clips to MP4 with real VP9 to H.264 transcoding, determinate progress and no length cap.