MP3 to FLAC Converter
Convert MP3 audio files to FLAC audio online. Free, fast and private. No signup required.
How to convert MP3 to FLAC
- Upload your MP3 file, or drag it into the box above.
- FLAC is already selected as the output format. Change it if you need something else.
- Click Convert, then download your FLAC file.
Why convert MP3 to FLAC?
- Your app, website or device may not open MP3 files, but FLAC is lossless compressed audio that works widely.
- FLAC is best for music collections, audiophile listening.
What to expect
The audio is re-encoded at high quality. Converting from a lossy format to another lossy format can't restore detail that was already lost.
About MP3 and FLAC
MP3 audio (MP3)
MP3 is the world's most universal audio format. It compresses music to a fraction of its original size.
Strengths- Plays on every device
- Small files
- Adjustable quality
- Lossy: some detail is discarded
FLAC audio (FLAC)
FLAC compresses audio without losing any quality, typically to about half the size of a WAV.
Strengths- Lossless quality
- Half the size of WAV
- Supports tags and album art
- Bigger than MP3
- Not supported by every player
MP3 vs FLAC
| MP3 | FLAC | |
|---|---|---|
| Full name | MP3 audio | FLAC audio |
| What it is | The most universal audio format | Lossless compressed audio |
| Compression | Lossy (smaller files) | Lossless (exact quality) |
| Best for | music, podcasts, voice notes | music collections, audiophile listening |
Frequently asked questions
How do I convert MP3 to FLAC?
Upload your MP3 file, make sure FLAC is selected as the output format, and click Convert. Your FLAC file downloads in seconds. No account or software is needed.
Is this MP3 to FLAC converter free?
Yes. It is completely free, with no signup, no watermark and no limit on how many files you convert.
Will I lose quality converting MP3 to FLAC?
The file is re-encoded at high quality, so the result looks and sounds nearly identical. Lossy formats always discard a little data, so keep the original if you need a perfect master.
Are my files safe?
Your file is processed once, in memory, to make the converted copy. It is not stored on our server or shared with anyone.
Can I convert several MP3 files at once?
Yes. Drop several MP3 files together and they are converted in one go. You can download them individually or as a ZIP.
What is the maximum file size?
Files up to 100 MB are supported. Larger videos and very large images may take a little longer to process.
More converters
Why QuickFix Beats the Rest
Built for speed, precision, and privacy — every time.
Instant Conversion
Files convert server-side with optimized pipelines. Most conversions complete in under 10 seconds, even for large files.
Batch Convert
Drop 50 files at once. Convert all to the same format and download individually or as a single ZIP package — one click.
Preview Before Download
View your converted file right in the browser before saving. Supports image preview, audio/video playback, and text preview.
Smart Format Detection
Upload a file and we instantly detect its type. Only compatible output formats are shown — no guessing, no errors.
Cloudflare Protected
Every upload is protected by Cloudflare WAF, rate limiting, and DDoS mitigation. Your files are safe from malicious actors.
Zero Storage
Files are processed in memory and deleted immediately. We never store your data permanently — not even temporarily.
How It Works
Four steps. Under a minute. Every time.
Upload Your Files
Drag and drop or click to browse. You can upload multiple files at once — up to 100MB each. We support every major format with zero setup required.
Choose Your Output Format
Smart detection shows only the formats compatible with your files. Search by name, browse by category, or click a popular conversion shortcut.
Adjust Quality Settings (Optional)
Fine-tune image quality, audio bitrate, video resolution, and more. Or leave defaults for the best automatic settings.
Preview & Download
When conversion is complete, preview your file in the browser first. Then download individually or as a ZIP — no auto-download, you're always in control.
Supported Formats
200+ formats across every major category
Frequently Asked Questions
Images (output): JPG, PNG, GIF, BMP, WebP, TIFF, ICO, PDF, SVG
Documents: TXT, Markdown (MD), HTML, Word (DOCX) and PDF — headings, lists, tables and pictures are kept where the target format allows
PDF to images: every page becomes a JPG or PNG (several pages arrive as a ZIP)
Spreadsheets: CSV, TSV, Excel (XLSX) and JSON — convert between them, or to HTML and PDF
Audio and video converting is available when the server supports it. Old .doc/.xls files, PowerPoint (PPTX), archives and e-books are not supported yet.