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Free local audio converter — no uploads

FLAC to MP3 Converter — Free, Local, No Upload

The short answer: FLAC is the archival format: lossless compression that keeps every sample of the original recording. Converting FLAC to MP3 decodes that pristine audio and re-encodes it for places where size matters — phones, cars, web pages, and players that do not read FLAC. Because the source is lossless, the MP3 starts from the best possible input and you control exactly how much of that fidelity survives.

How to convert FLAC to MP3

Convert FLAC to MP3 now

The button opens the Audio Converter with FLAC → MP3 preselected — it runs entirely in your browser and nothing is uploaded.

Open Audio Converter

Local in your browser — nothing is uploaded

  1. Open the converter

    The button above opens the Audio Converter with the MP3 output already selected.

  2. Drop your FLAC file

    Add the file (up to 200.0 MiB); the format is verified from its signature, not its name.

  3. Convert and download

    Press Convert; the ffmpeg audio engine (~31 MB) downloads on first use, then your file transcodes in a dedicated worker. Cancel stops the run cleanly.

Conversion facts

Input format
FLAC
Output format
MP3
Max file size
200.0 MiB
Max output
200.0 MiB
Quality
Lossy — 96–192 kbps in three tiers
Processing
Local in your browser — nothing is uploaded

FLAC

FLAC → MP3

What to watch

The encode is lossy: the converter decodes the FLAC fully and re-encodes MP3 with libmp3lame at 96/128/192 kbps, so detail below the chosen bitrate is discarded — keep the FLAC as your archive. Sample rate and channel count pass through untouched, and multi-channel high-resolution FLAC decodes to whatever the source holds. Inputs are capped at 200 MiB and outputs at 200 MiB, with a 5-minute per-run watchdog; the ~31 MB conversion engine downloads on first use, then stays cached on your device.

Keep converting

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  • The tool behind this page

    Audio Converter

    Convert MP3, WAV, M4A, OGG and FLAC audio between formats entirely in the browser with ffmpeg.wasm — no uploads. Inputs up to 200 MB with 96/128/192 kbps bitrate tiers for lossy output; OGG uses Opus and WAV/FLAC stay lossless.

Frequently asked questions

Will converting FLAC to MP3 reduce audio quality?
Yes — MP3 is lossy, so the conversion discards whatever the chosen bitrate cannot keep. The difference from other sources is the starting point: FLAC decodes to the exact original samples, so the MP3 is a first-generation encode from a pristine source rather than a re-compression of something already lossy. Keep the FLAC archived and treat the MP3 as the portable copy.
Which bitrate should I choose for the MP3?
Three tiers are offered: Compact 96, Balanced 128, and Quality 192 kbps. High-resolution FLAC sources benefit from the Quality tier (192 kbps), where MP3 is at its cleanest; Balanced 128 is the everyday choice for casual listening, and Compact 96 suits long spoken-word recordings.
Are my audio files uploaded anywhere?
No. Decoding and encoding run in a WebAssembly build of ffmpeg inside your browser tab — the file never leaves your device, nothing is uploaded or stored on a server, and closing the tab discards everything.