All Clapr Tools
16 free tools for video and audio. Everything runs inside your browser — your files never leave your device, and there is nothing to install or sign up for.
Compress
Shrink a file so it fits under an upload limit, without the quality falling apart.
Convert formats
Change the container or codec so a file plays where you need it to.
Convert MOV to MP4
Turn iPhone / Mac MOV videos into universal MP4 — entirely in your browser. No watermark, no upload, no queue.
Convert MP4 to WebM
Turn MP4 into WebM (VP9 + Opus) for open-web playback and smaller HTML5 <video> files — entirely in your browser.
Convert WebM to MP4
Turn WebM into MP4 (H.264 + AAC) for universal playback on iOS, Premiere, FCP, and every social platform — in your browser.
Convert MP4 to MKV
Put your MP4 into a Matroska (MKV) container for multi-track audio, subtitle support, and media-library-friendly metadata — in your browser.
Convert MP4 to GIF
Turn MP4 clips into sharable GIFs with a proper optimized palette — entirely in your browser. Tune fps and width for the best size.
Audio
Pull the audio track out of a video, or move between audio formats.
Extract Audio from Video
Pull MP3 or WAV audio out of any video — entirely in your browser. Zero upload, zero watermark.
Convert WAV to MP3
Shrink uncompressed WAV audio to portable MP3 — 128 to 320 kbps, entirely in your browser.
Convert MP3 to WAV
Turn compressed MP3 back into uncompressed WAV (PCM 16-bit) for import into Ableton, Logic, Pro Tools, and Audacity — entirely in your browser.
Convert M4A to MP3
Turn AAC-in-M4A audio (iTunes, iPhone voice memos, Apple Music purchases) into portable MP3 — entirely in your browser.
Convert FLAC to MP3
Shrink lossless FLAC tracks to portable MP3 for phones, cars, and casual listening — entirely in your browser.
Convert OGG to MP3
Turn OGG Vorbis tracks (gaming rips, Firefox recordings, open-source tools) into MP3 for broad device compatibility — entirely in your browser.
Subtitles
Convert between subtitle formats, or burn captions permanently into the picture.
SRT to VTT Converter
Convert SubRip (.srt) to WebVTT (.vtt) in a blink — HTML5 <video> friendly, entirely in your browser.
VTT to SRT Converter
Convert WebVTT (.vtt) back to SubRip (.srt) for legacy players and video editors — entirely in your browser.
Burn Subtitles into Video
Hardcode SRT / ASS / VTT captions into your MP4 so they show up on every player, every device, every platform — entirely in your browser.
Why nothing gets uploaded
Clapr runs FFmpeg compiled to WebAssembly directly in your browser tab. Your file is read from disk, processed locally, and written back — it is never sent to a server. That also means there is no queue, no file-size ceiling imposed by an upload limit, and no copy of your video sitting in someone else’s storage.