{"$schema":"https://toolsly.tools/schemas/tool-manifest-v1.json","generated":"2026-05-20T20:47:38.152Z","discovery":{"catalog":"https://toolsly.tools/tools.json","llmsTxt":"https://toolsly.tools/llms.txt","sitemap":"https://toolsly.tools/sitemap.xml"},"relatedTools":[{"slug":"video-trimmer","name":"Video Trimmer","url":"https://toolsly.tools/video-trimmer"},{"slug":"video-compress","name":"Compress Video","url":"https://toolsly.tools/video-compress"},{"slug":"mp4-to-webm","name":"MP4 to WebM","url":"https://toolsly.tools/mp4-to-webm"},{"slug":"mp4-to-mkv","name":"MP4 to MKV","url":"https://toolsly.tools/mp4-to-mkv"},{"slug":"mp4-to-mov","name":"MP4 to MOV","url":"https://toolsly.tools/mp4-to-mov"},{"slug":"mp4-to-gif","name":"MP4 to GIF","url":"https://toolsly.tools/mp4-to-gif"},{"slug":"mp4-to-mp3","name":"MP4 to MP3","url":"https://toolsly.tools/mp4-to-mp3"},{"slug":"mp4-to-wav","name":"MP4 to WAV","url":"https://toolsly.tools/mp4-to-wav"}],"kind":"converter","slug":"mp4-to-flac","name":"MP4 to FLAC","description":"Extract the audio track from an MP4 video as a FLAC file — free online.","longDescription":"Pull the audio track out of an MP4 and re-encode it as FLAC, a lossless compressed audio format. The video stream is discarded — this is the right tool when you want the cleanest possible audio extraction for archival or further editing. Heads-up: MP4 audio is almost always AAC, which is lossy, so the FLAC will faithfully preserve the decoded audio but it can't recover information the original AAC encode threw away — you don't get true lossless from a lossy source. The conversion runs entirely in your browser via ffmpeg.wasm; nothing is uploaded. FLAC files are noticeably larger than MP3 or AAC but smaller than WAV.","category":"video","categoryName":"Video","keywords":["mp4 to flac","convert mp4 to flac","mp4 to flac converter","mp4 to flac online","mp4 to flac free","online mp4 to flac","change mp4 to flac","mp4 flac converter","free mp4 to flac","online mp4 to flac converter","extract audio from mp4","mp4 audio extractor","mp4 to flac converter online","extract flac from mp4","video to flac"],"url":"https://toolsly.tools/mp4-to-flac","runsOn":"client","multiple":false,"batch":false,"input":{"type":"file","extensions":[".mp4"],"mimeTypes":["video/mp4"]},"output":{"type":"file","extension":".flac","mimeType":"audio/flac"},"options":[],"invocation":{"webUi":"https://toolsly.tools/mp4-to-flac","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."}}