{"$schema":"https://toolsly.tools/schemas/tool-manifest-v1.json","generated":"2026-05-20T20:47:38.143Z","discovery":{"catalog":"https://toolsly.tools/tools.json","llmsTxt":"https://toolsly.tools/llms.txt","sitemap":"https://toolsly.tools/sitemap.xml"},"relatedTools":[{"slug":"audio-trimmer","name":"Audio Trimmer","url":"https://toolsly.tools/audio-trimmer"},{"slug":"webm-to-mp4","name":"WebM to MP4","url":"https://toolsly.tools/webm-to-mp4"},{"slug":"mp4-to-mp3","name":"MP4 to MP3","url":"https://toolsly.tools/mp4-to-mp3"},{"slug":"mov-to-mp3","name":"MOV to MP3","url":"https://toolsly.tools/mov-to-mp3"},{"slug":"avi-to-mp3","name":"AVI to MP3","url":"https://toolsly.tools/avi-to-mp3"},{"slug":"mp4-to-webm","name":"MP4 to WebM","url":"https://toolsly.tools/mp4-to-webm"},{"slug":"wav-to-mp3","name":"WAV to MP3","url":"https://toolsly.tools/wav-to-mp3"},{"slug":"ogg-to-mp3","name":"OGG to MP3","url":"https://toolsly.tools/ogg-to-mp3"}],"kind":"converter","slug":"webm-to-mp3","name":"WEBM to MP3","description":"Extract the audio track from a WEBM video as an MP3 file — free online.","longDescription":"Pull the audio track out of a WEBM file and save it as a high-quality VBR MP3 (around 190 kbps, ffmpeg quality 2). The video stream is discarded — this is the right tool when you want a podcast, lecture, music clip, or voice memo extracted from a WEBM video (the format you typically get from web recordings, YouTube downloads, or OBS captures). The conversion runs locally via ffmpeg.wasm, so your file never leaves your device. WEBM commonly contains Opus or Vorbis audio, both of which are lossy, so the resulting MP3 is a re-encode of already-lossy audio — fine for sharing, but not the best path if you need maximum fidelity.","category":"video","categoryName":"Video","keywords":["webm to mp3","convert webm to mp3","webm to mp3 converter","webm to mp3 online","webm to mp3 free","online webm to mp3","change webm to mp3","webm mp3 converter","free webm to mp3","online webm to mp3 converter","extract audio from webm","webm audio extractor","webm to mp3 converter online","video to mp3"],"url":"https://toolsly.tools/webm-to-mp3","runsOn":"client","multiple":false,"batch":false,"input":{"type":"file","extensions":[".webm"],"mimeTypes":["video/webm"]},"output":{"type":"file","extension":".mp3","mimeType":"audio/mpeg"},"options":[],"invocation":{"webUi":"https://toolsly.tools/webm-to-mp3","api":null,"notes":"Currently runs client-side in the user's browser. Drop a file on the UI at `webUi` and download the converted result. A remote MCP/REST API is planned."}}