MP3 editing tools
Go beyond conversion - Trim, merge, normalize, change speed and adjust bitrate.
MP3 Cutter / Trim
Cut a clip from any track by start and end time. Perfect for ringtones, samples, and highlights.
Free · Precise seconds
Merge MP3
Join multiple audio files into one continuous track, in the order you choose.
Free · Batch join
Normalize Volume
Even out loudness so quiet and loud tracks all play at a consistent level.
Free · Loudness
Speed Changer
Speed up or slow down audio. Great for podcasts, language practice, and transcription.
Free · 0.5×–2×
Change Bitrate
Re-encode an MP3 at exactly 128, 192, 256 or 320 kbps to balance quality and size.
Free · 128–320 kbps
Convert to MP3
Turn any audio format into a universally compatible MP3 file.
WAV
→
MP3
Convert WAV to MP3 Online
M4A
→
MP3
Convert M4A to MP3 Online
AAC
→
MP3
Convert AAC to MP3 Online
OGG
→
MP3
Convert OGG to MP3 Online
OGA
→
MP3
Convert OGA to MP3 Online
WMA
→
MP3
Convert WMA to MP3 Online
AIFF
→
MP3
Convert AIFF to MP3 Online
AIF
→
MP3
Convert AIF to MP3 Online
Opus
→
MP3
Convert Opus to MP3 Online
AMR
→
MP3
Convert AMR to MP3 Online
AC3
→
MP3
Convert AC3 to MP3 Online
ALAC
→
MP3
Convert ALAC to MP3 Online
CAF
→
MP3
Convert CAF to MP3 Online
AU
→
MP3
Convert AU to MP3 Online
RA
→
MP3
Convert RA to MP3 Online
Extract audio from video
Pull the soundtrack out of MP4, MOV, MKV, AVI, WebM and more as MP3.
M4B
→
MP3
Convert M4B to MP3 Online
MP4
→
MP3
Convert MP4 to MP3 Online
M4V
→
MP3
Convert M4V to MP3 Online
MOV
→
MP3
Convert MOV to MP3 Online
MKV
→
MP3
Convert MKV to MP3 Online
AVI
→
MP3
Convert AVI to MP3 Online
WebM
→
MP3
Convert WebM to MP3 Online
FLV
→
MP3
Convert FLV to MP3 Online
WMV
→
MP3
Convert WMV to MP3 Online
3GP
→
MP3
Convert 3GP to MP3 Online
MPEG
→
MP3
Convert MPEG to MP3 Online
MPG
→
MP3
Convert MPG to MP3 Online
TS
→
MP3
Convert TS to MP3 Online
VOB
→
MP3
Convert VOB to MP3 Online
Convert from MP3
Export your MP3 files to WAV, M4A, AAC, OGG, FLAC and more.
MP3
→
WAV
Convert MP3 to WAV Online
MP3
→
M4A
Convert MP3 to M4A Online
MP3
→
AAC
Convert MP3 to AAC Online
MP3
→
OGG
Convert MP3 to OGG Online
MP3
→
FLAC
Convert MP3 to FLAC Online
MP3
→
WMA
Convert MP3 to WMA Online
MP3
→
AIFF
Convert MP3 to AIFF Online
MP3
→
Opus
Convert MP3 to Opus Online
MP3
→
AMR
Convert MP3 to AMR Online
MP3
→
AC3
Convert MP3 to AC3 Online
MP3
→
ALAC
Convert MP3 to ALAC Online
MP3
→
CAF
Convert MP3 to CAF Online
MP3
→
AU
Convert MP3 to AU Online
MP3
→
M4R
Convert MP3 to M4R Online
MP3
→
MP2
Convert MP3 to MP2 Online
MP3
→
WV
Convert MP3 to WV Online
MP3
→
MP3
Trim & Cut MP3 Online
MP3
→
MP3
Merge & Join MP3 Files Online
MP3
→
MP3
Normalize & Boost MP3 Volume Online
MP3
→
MP3
Change MP3 Bitrate Online
MP3
→
MP3
Convert MP3 to 320 kbps Online
MP3
→
MP3
Convert MP3 to 256 kbps Online
MP3
→
MP3
Convert MP3 to 192 kbps Online
MP3
→
MP3
Convert MP3 to 128 kbps Online
MP3
→
MP3
Convert MP3 to 64 kbps Online
MP3
→
MP3
Convert Stereo MP3 to Mono Online
MP3
→
MP3
Change MP3 Speed Online
Compress & optimize audio
Reduce file size while keeping good sound quality for sharing and storage.
Choosing the Right Audio Format
- Universal playback — MP3 for phones, cars, and any media player
- Editing & mastering — WAV for uncompressed, lossless quality
- Apple & streaming — M4A / AAC for better quality per kilobyte
- Archiving — FLAC for lossless quality at half the size of WAV
| Format | Best For | Compression | Lossless | Typical Size (3 min) | Convert |
|---|---|---|---|---|---|
| MP3 | Music, podcasts, universal playback | Lossy | No | 3–7 MB | Compress MP3 |
| WAV | Editing, mastering | None (PCM) | Yes | 30–50 MB | MP3 → WAV |
| M4A / AAC | Apple Music, streaming | Lossy | No | 3–6 MB | M4A → MP3 |
| FLAC | Archiving, audiophile playback | Lossless | Yes | 15–25 MB | FLAC → MP3 |
| OGG | Games, open-source apps | Lossy (Vorbis) | No | 3–6 MB | OGG → MP3 |
| WMA | Legacy Windows Media audio | Lossy | No | 3–6 MB | WMA → MP3 |
| M4R | iPhone ringtones | Lossy (AAC) | No | <1 MB clip | MP3 → M4R |
MP3 Bitrate Settings
- 320 kbps — maximum quality, use for audiophile listening and archiving
- 256 kbps — excellent quality, great for high-quality music
- 192 kbps — very good, the recommended balance for most listeners
- 128 kbps — good, ideal for voice, podcasts, and the smallest files
| Bitrate | Quality | Typical Use Case | Approx. Size (3 min) |
|---|---|---|---|
| 320 kbps | Maximum, near-lossless perceived | Audiophile, archiving | ~7.0 MB |
| 256 kbps | Excellent, transparent for most | High-quality music | ~5.6 MB |
| 192 kbps | Very good, recommended default | General music listening | ~4.2 MB |
| 128 kbps | Good, some detail lost | Voice, podcasts, small files | ~2.8 MB |
Use the bitrate changer or MP3 compressor to choose your quality level interactively.
Why Convert Audio Online?
- No install — runs in any browser; nothing to download or license
- Works on mobile — full conversion on iOS and Android, no desktop required
- Private — files deleted automatically after 24 hours, never shared
- Batch support — convert up to 20 files simultaneously in parallel
Private & Secure
All uploads use encrypted HTTPS. Files are automatically purged after 24 hours and never shared with third parties.
Fast Conversion
Most conversions complete in under 5 seconds. Batch uploads process files in parallel for maximum throughput.
Full Control
Set bitrate, sample rate, and channels, or trim and normalize your track. Advanced options, simple interface.
Works Everywhere
No plugins or downloads - Runs in your browser on any device. Fully optimised for iOS and Android.
No Account Needed
Upload, convert, and download without registering. No email required, no watermarks, no hidden limits for standard conversions.
Frequently asked questions
The short answers — for more detail, every converter page has its own deep-dive FAQ.
Are all mp3.now tools free?
Yes. Every tool on this page works without payment or signup. Guests can convert 10 files per day with files up to 10 MB; a free account lifts that to 20 files per day with files up to 50 MB. Premium adds unlimited conversions, 200 MB uploads, and no ads from $7.99/mo.
Do I need to install anything?
No — every tool runs in the cloud. Conversions run on our servers and uploads are auto-deleted within 24 hours. There is nothing to download, license, or configure.
Which converter tool should I use?
Pick by your source and target format. To shrink a file, use Compress MP3. To change format, find the matching slug like WAV to MP3 or MP3 to WAV — every converter is listed above. For unusual input, the generic MP3 Converter handles any audio or video FFmpeg can read.
What's the difference between converting, compressing, and trimming?
Converting changes the file format (WAV → MP3, M4A → MP3) — useful for compatibility. Compressing keeps the MP3 format but reduces file size by lowering the bitrate. Trimming cuts the audio to a shorter section. The three are independent; the MP3 cutter and bitrate changer handle the last two.
Are my files safe and private?
Uploads travel over HTTPS, sit in isolated per-session folders, and are auto-deleted within 24 hours for guests (7 days for free accounts, 365 days for Premium). We never index, share, or train AI on your uploads.
Can I convert multiple files at once?
Yes — every converter accepts batch uploads of up to 10 files on the free tier. Premium raises this to 50 per batch. Files process in parallel on our workers, so a batch of 10 typically finishes in roughly the same time as a single file.