No ads · No watermarks · Files deleted after an hour
Audio Compressor
Make audio files smaller by lowering the bitrate.
The audio compressor makes MP3, WAV, M4A, FLAC and OGG files smaller by saving them as MP3 at a lower bitrate. It's a quick way to get a recording under an email or upload limit.
Almost any file
Images, vector art, video, audio, documents, spreadsheets, slides, ebooks and archives: more than 400 conversions. Before anything runs, Filebender says what a conversion will lose and estimates the size of video, audio and many pictures; other files show their size once converted. It compresses PDFs, pictures and videos to the size you choose.
No ads, no watermarks
With a free account: 20 files a day, 2 of them videos, each up to 500 MB. No plan has ads, and nothing is stamped on your files. A pass is one payment that never renews, and one you haven't used can be refunded in full.
Private by default
Files are deleted an hour after converting, or at once when you ask, and photo location is removed unless you choose to keep it. Photos converted to JPG, PNG or WebP are done on your device when your browser can, so they never leave it. They still need your account and count towards your plan.
How to use the Audio Compressor
- Create a free account with Google or your email address, or sign in.
- Choose your files: drop them on the box, pick them from your computer, open them from Google Drive, or paste a link.
- Choose how small: a strength, or a target size you choose. The gear button has more settings.
- Press “Compress”, then download each file, or all of them in one ZIP.
The strengths
Light saves at 160 kbps, Balanced at 128 kbps and Strong at 96 kbps. Speech still sounds clear at Strong; music keeps more of its detail at Light. An MP3 already at a low bitrate won't shrink much, and compressing it again costs a little quality, so start from the original if you have it.
A size you choose
Give a size in KB or MB and Filebender sets the bitrate from the recording's length, so the MP3 lands close to it. A very long recording squeezed into a very small size reaches the floor of 32 kbps, which is only fit for speech.
How it counts
Each recording counts as one ordinary file, not a video: with a free account you get 20 a day, each up to 500 MB. The result's size is shown before you compress. Compression runs on Filebender's servers, and files are deleted an hour after converting.
Related tools
- WAV to MP3Shrink WAV recordings into MP3s about a tenth of the size.
- Trim AudioCut the silence, the intro or anything else off a recording or a song, using its waveform.
- Video CompressorMake videos smaller for sharing, by strength or to the size you choose.
- Audio ConverterConvert audio to MP3, WAV, AAC, FLAC, OGG or OPUS, or take the soundtrack from a video.
Questions
Can I use a format other than MP3?
Yes. Pick OPUS or OGG from a file's format list; both can sound better than MP3 at the same low bitrate, if the app you'll play it in accepts them. FLAC and WAV are lossless and can't get much smaller without becoming lossy.
Can I cut the recording as well?
Yes. Press Trim and keep only the part you need; a shorter recording shrinks in proportion.
Are tags kept?
Title, artist and similar details are removed by default. Tick “Keep photo details” in the settings to keep them.
Is Filebender free?
Yes, with a free account: 20 files every day (up to 2 of them videos), each up to 500 MB, with no watermark and no ads. Make the account with Google or your email address. Files converted on your device count the same way as the rest. If you need more, a Day, Week or Month Pass is one payment that never renews; see the Pricing page.
What happens to my files?
It depends on the file. Pictures your browser can convert itself, and everything you do with the PDF tools, from merging and splitting PDFs to putting photos into one, are handled on your device and never leave it, unless you choose to send a file to Filebender's servers. They still need your account: Filebender receives only their type and size, to count them against your plan like any other file. Everything else is converted on Filebender's servers on Google Cloud and deleted an hour after the conversion finishes, or straight away when you press “Delete files now”. Nobody looks at your files, and they're never used for anything else.
Is there a size limit?
With a free account, each file can be up to 500 MB (about 4 minutes of HD phone video), and a batch can have up to 20 files. Any pass takes files up to 2 GB (about 15 minutes of HD video).