Whole-folder batch conversion
Pick a source folder and a target folder; every subfolder is scanned recursively, and the output keeps the same directory structure at the target.
Free batch audio converter: convert a whole library while keeping tags, covers, and DSD-to-PCM support
Batch-convert your whole music library without losing a single tag or cover
PureConvert Batcher batch-converts the music in a folder into another format, keeping the subfolder structure exactly as it was and copying tags and covers along. It outputs MP3, FLAC, M4A, WAV, OGG, Opus, and AIFF, and can turn DSD (DSF / DFF) into PCM at your choice of sample rate and bit depth. When an intact file with the same name already exists at the target, it gets skipped, so repeated runs never redo work. Completely free, with no count or usage limits, and all processing stays on your machine.
Feature set
Seven output formats
MP3, FLAC, M4A, WAV, OGG, Opus, AIFF. Input supports all of those plus AAC, APE, and DSD (DSF / DFF).
Keep tags and covers
After conversion, the tags (title, artist, album, genre, and more) and cover art from the original file are copied in full to the new file.
DSD to PCM
DSF / DFF converts to FLAC, WAV, AIFF, and similar formats, with sample rates of auto, 44.1, 88.2, 176.4, 352.8 kHz and bit depths of auto, 16, 24, 32-bit.
Smart skipping
When the target already has a file with the same name, format, and intact content, it is skipped outright; a same-name file with the wrong format, a big duration mismatch, or corruption is re-converted and overwritten.
Quality options
MP3 offers three quality levels (320, 192, 128 kbps); FLAC offers three compression levels. When converting between FLAC, WAV, and AIFF, the audio data stays unchanged.
Filter by type
Convert all audio or pick by extension. For example, select only FLAC, APE, and WAV to avoid re-converting files that are already lossy.
Completely free
No in-app purchases, no limits on file count or runs. For loudness normalization, denoise, silence trimming, or a command line, take a look at PureConvert Pro.
In depth
How it works
- Pick the source folder: where your original music lives; subfolders are scanned along with it.
- Pick the target folder: converted results land here with the same directory structure as the source. The target can’t be the same folder as the source.
- Pick what to convert: all audio, or check the extensions you want.
- Pick output format and quality: high / medium / low quality for MP3, a compression level for FLAC; if the source contains DSD and the output isn’t MP3, you can set sample rate and bit depth.
- Start converting: the progress page shows scanned, matched, skipped, and pending counts plus logs, and a summary at the end.
Format overview
| Supported formats | |
|---|---|
| Input | DSF, DFF, FLAC, APE, WAV, AIFF, MP3, M4A, AAC, OGG, Opus |
| Output | MP3, FLAC, M4A, WAV, OGG, Opus, AIFF |
DSD can’t be an output. DSD to PCM is a real conversion, not a lossless move; the higher the sample rate you pick, the larger the files.
Reruns don't redo work
PureConvert Batcher is built for maintaining a “mirror library”: say a FLAC master library with an MP3 copy alongside. When new albums land in the master, run it again and it checks the target:
- Files with matching name, format, and intact content are skipped outright;
- Same-name files with the wrong format, a big duration gap, or corruption get re-converted and overwritten;
- Files that don’t exist yet are converted normally.
That way each run only handles what’s new or broken. Before starting, make sure the target disk has enough space.
How it differs from PureConvert Pro
| PureConvert Batcher | PureConvert Pro | |
|---|---|---|
| Batch conversion, tags and covers kept | ✓ | ✓ |
| DSD to PCM, smart skipping | ✓ | ✓ |
| Denoise, silence trim, fades, channel conversion | ✓ | |
| Loudness normalization, ACX audiobook preset | ✓ | |
| Command line | ✓ (subscription) | |
| Price | Free | Free tier with limits; lifetime license or subscription |
For plain format conversion, Batcher is enough. Consider Pro when you need unified loudness, podcast or audiobook delivery, or conversion inside scripts.
Privacy and system requirements
All conversion happens locally. No network, no account, no usage statistics, and files are never uploaded.
- Platforms: macOS 13.5 or later (Mac App Store); Windows (Microsoft Store).
- Interface languages: Chinese, English.
Who it is for
- Music collectors: turn a FLAC library into MP3 or AAC copies for a phone, car stereo, or old player
- DSD users: convert DSF / DFF to FLAC or WAV for devices that don't play DSD
- People consolidating media: unify audio from mixed sources into a single format
FAQ
Is PureConvert Batcher really free?
Yes. No in-app purchases, no limits on file count or runs, and every feature is available right away.
Do tags and covers survive conversion?
Yes. After conversion, the tags and cover art from the original file are copied in full to the new file.
Can it convert DSD to FLAC or WAV?
Yes. DSF / DFF converts to PCM formats like FLAC, WAV, and AIFF, up to 352.8 kHz, at 16, 24, or 32-bit. It can also go straight to MP3. It can't convert back to DSD.
How many files can it handle at once?
There's no limit. A library of a few thousand tracks can be converted by picking its whole folder; subfolder structure is preserved.
Will a rerun re-convert everything?
No. Intact same-name files at the target are skipped; only new and problematic files get converted.
Does FLAC to WAV lose quality?
No. Converting between the lossless formats FLAC, WAV, and AIFF keeps the audio data unchanged. Quality is only lost going to lossy formats like MP3, M4A (AAC), OGG, or Opus.
Does it need a network?
No. Conversion happens locally and files are never uploaded.
Tech and privacy note
PureConvert Batcher is designed for offline local processing and does not depend on cloud transcoding. Read ourprivacy policyfor full data-handling details.
Related products
PureStream
Local music server for Mac and Windows: one unified library, original-quality LAN streaming, on-demand transcoding, and encrypted remote access (in development)
PurePlayer Hi-Res
Hi-Res local music player for iPhone, iPad, and Mac, with Bit-Perfect, DSD, and NAS / cloud library support
PureConvert Pro
Batch audio processing for delivery: convert formats while denoising, normalizing loudness and trimming silence, plus a CLI