FLAC to MP3 Converter

Convert FLAC to MP3 Online — Free

To convert FLAC to MP3, upload your FLAC file, pick a bitrate — 320 kbps for near-transparent quality, 192 kbps for a smaller file — and click Convert. Conversion runs on our servers, so there's nothing to install, and your files are deleted automatically after a few hours. Real result: a ~30 MB FLAC track becomes about a 7 MB MP3 at 320 kbps — small enough for any phone or car stereo, and plays everywhere FLAC doesn't.

How to Convert FLAC to MP3 Online

1. Upload Your FLAC Files: Drag and drop or click "+ Add Files" to select FLAC tracks from your computer. Batch upload is supported — drop an entire album folder at once.
2. Pick Quality Preset or Custom Bitrate: Open Advanced Options. The default Quality Preset is Highest (320 kbps CBR), which produces the highest-fidelity MP3 from a lossless source. Switch to Custom Bitrate → Constant Bitrate for an exact rate (128/192/256/320 kbps), or Variable Bitrate for LAME-style VBR ranges that mirror the V0 (245 kbps) and V2 (190 kbps) presets. You can also target a Specific file size if you need to fit an album under an upload cap.
3. Set Audio Channel, Sample Rate, or Trim (Optional): Leave Audio Channel and Audio Sample Rate on Unchanged to inherit the FLAC's 44.1/48/96 kHz source. Switch to Mono to halve file size for spoken word, or downsample to 44.1 kHz if your target device is fussy. Use Trim to clip silence or extract a section.
4. Convert and Download: Click "Convert." Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared. Download tracks individually or as a ZIP.

Why Convert FLAC to MP3?

FLAC (Free Lossless Audio Codec) is a bit-perfect compressed format — it preserves every sample of the original recording, typically at 50-70% of the WAV size. MP3 is lossy: a psychoacoustic encoder discards data your ear is least likely to notice, shrinking files 5-10x further. Converting from FLAC produces the best possible MP3 because the encoder is working from the full source, not a re-compressed one.

• Storage and mobile playback — A 12-track FLAC album typically runs 250-400 MB; the same album at 320 kbps MP3 fits in 80-110 MB, and at V2 (~190 kbps VBR) in 50-70 MB. That's the difference between 50 albums and 250 albums on a 16 GB phone partition.
• Car stereos and Bluetooth speakers — Many factory head units (older Toyota, Honda, GM units) and basic Bluetooth speakers play MP3 but reject FLAC. The Bluetooth A2DP profile itself re-encodes to SBC or AAC during streaming, so the lossless source delivers no audible benefit over Bluetooth.
• iTunes and Apple Music libraries — Apple's stack does not natively support FLAC; it uses ALAC (Apple Lossless) instead. Convert to 320 kbps MP3 or FLAC to M4A for Apple-ecosystem libraries.
• Sharing and email — Gmail caps attachments at 25 MB, and most messaging apps cap audio uploads. A FLAC track that's 35-45 MB won't attach; the MP3 equivalent at 8-10 MB will.
• DJ software and old MP3 players — Serato, Rekordbox, and Traktor accept FLAC, but many older Pioneer CDJs (CDJ-900 and earlier), Sansa Clip, iPod Classic, and Walkman-era devices index MP3 only.
• Podcast and audiobook workflows — Distribution platforms (Spotify, Apple Podcasts, Libsyn) require MP3 or AAC. FLAC is the archival master; MP3 at 96-128 kbps mono is the delivery format.

FLAC vs MP3 vs AAC — Format Comparison

MP3 Bitrate Quick Guide for FLAC Sources

Because your input is lossless, the encoder has the full signal to work with — every output bitrate listed below will sound better than the same bitrate transcoded from another lossy source. LAME (the reference MP3 encoder) reaches statistical transparency for most listeners around 256 kbps; the 320 vs 256 difference is inaudible in published blind ABX tests for the vast majority of listeners.

Frequently Asked Questions

Is converting FLAC to MP3 lossless?

No — MP3 is a lossy format, so some audio data is discarded during conversion. In practice, at 256-320 kbps the result is transparent to most ears and indistinguishable from the source in blind tests. Keep your FLAC files as the master, since you can re-encode from them anytime.

Will MP3 sound worse than my original FLAC?

At 256 kbps or higher (CBR or V0 VBR), most listeners cannot distinguish the MP3 from the FLAC in blind ABX tests — the LAME encoder reaches statistical transparency for the vast majority of music at these rates. Below 192 kbps, artifacts (pre-echo on transients, swirly cymbals, smeared reverb) become detectable on revealing playback systems. Keep your FLAC originals as the master — you can never recover what MP3 discards, but you can always re-encode at a different bitrate later.

Should I use 320 kbps CBR or VBR V0?

V0 (~245 kbps average) usually wins. Variable bitrate spends more bits on dense passages (full orchestra, crash cymbals) and fewer on simple ones (solo voice, sustained pads), so it tracks perceptual complexity better than a fixed 320 kbps. Output is roughly 25-30% smaller than 320 CBR with no audible quality penalty in published listening tests. Choose CBR 320 only if your target device is fussy about variable bitrate (some 2005-era car stereos and Walkman MP3 players) or your platform requires a fixed bitrate.

Will my album art, artist, and track tags transfer?

Yes, in most cases. FLAC stores metadata as Vorbis Comments (a UTF-8 key/value system) and album art in dedicated picture blocks. The converter maps these to ID3v2 frames in the MP3 — ARTIST, TITLE, ALBUM, TRACKNUMBER, DATE, GENRE, and embedded cover art (mapped to the ID3v2 APIC frame) survive. Uncommon fields (custom tags, ReplayGain values, lyrics with timestamps) may not carry over; if metadata is critical, verify in a tag editor like Mp3tag after conversion.

Can I convert a full album in one pass?

Yes. Drop every track from the album into the file list, set the bitrate once, and click Convert. Each track is encoded independently using the same settings, so cross-track loudness stays consistent and tags survive per-file. Download individually or as a single ZIP. For very long DJ mixes or live recordings stored as one FLAC, use the Trim option to slice into separate tracks before encoding.

Why does iTunes / Apple Music refuse my FLAC files?

Apple's audio stack does not support FLAC playback in iTunes, Apple Music, or the Music app on macOS/iOS — it uses ALAC (Apple Lossless Audio Codec) instead. Converting FLAC to MP3 is the simplest path to get tracks into an Apple library; for lossless retention inside the Apple ecosystem, convert to ALAC via FLAC to M4A instead.

My FLAC is 96 kHz / 24-bit — should I downsample for MP3?

The MP3 format supports up to 48 kHz; rates above that (88.2, 96, 176.4, 192 kHz from high-res FLAC) are resampled to 48 kHz or 44.1 kHz during encoding. Leaving Audio Sample Rate on Unchanged lets the converter pick the closest legal rate (typically 44.1 or 48 kHz). 24-bit depth is also collapsed — MP3 internally represents audio after the lossy transform, so source bit depth above 16 has no effect on the output.

Should I keep my FLAC files after converting?

Yes. MP3 is a delivery format, not an archive format. Disk is cheap; a re-rip from your physical CDs or a re-download from your original lossless source is expensive. Keep the FLACs on an external drive or NAS, and treat the MP3s as derived files you can regenerate anytime. If you ever want to convert to a future format (Opus at 96 kbps already beats MP3 at 128), you'll need the lossless master.

How do I shrink an MP3 below the bitrate sweet spot for a podcast or audiobook?

For spoken word, switch Audio Channel to Mono (halves the data rate at no quality cost for a single speaker), drop bitrate to 64-96 kbps CBR, and set Audio Sample Rate to 22050 or 24000 Hz. The result is around 0.5-0.7 MB per minute — Apple Podcasts and Spotify accept these settings, and listeners on earbuds will not hear the difference. For music, do not go below 192 kbps; artifacts become obvious. See also compress MP3 for already-encoded files.

Can I cut a specific section of a FLAC during conversion?

Yes — use the Trim option. Set start time (HH:MM:SS) and duration to extract a clip in one step, useful for sampling, ringtones, or removing silent leaders from concert recordings. For multi-clip splits from a single file, the dedicated audio cutter tool is faster.