Music Lovers
Turn FLAC downloads into MP3 for the car, the gym or an older player, with tags and cover art so the library stays tidy.
Free MP3 Converter: Convert Any Audio File to MP3 Online
Drop in FLAC, OGG, AAC, WAV or almost any audio file and this free MP3 converter turns it into MP3 right in your browser. Pick 128 to 320 kbps, convert a whole batch, add tags and cover art, and download one file or a ZIP. No sign-in, and nothing is uploaded.
Free, No Sign-inFiles Stay on Your DeviceBatch Convert to ZIPMP3 Up to 320 kbps
Convert audio and video files to MP3
Supported formats: MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, MP4, MOV, WEBM, up to 1 GB and 60 minutes per file
or drag and drop several files at once
- Converted in your browser, nothing is uploaded
- Free, no sign-in
- Batch convert and ZIP download
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Why You Need an MP3 Converter Even in 2026
Audio arrives in a dozen formats: FLAC from a music store, OGG and OPUS voice notes from chat apps, AAC from a phone, WEBM audio from the web, WAV from a studio. Every format plays somewhere, but only MP3 plays everywhere. A good online MP3 converter fixes that in a few clicks, and when it runs in your browser you also avoid installing software or sending private recordings to a server. These are the problems people bring to an audio converter most often.
- A car stereo, smart speaker or old player that refuses FLAC, OGG or OPUS files
- Lossless files so large that they will not fit in an email or a phone
- Upload forms that accept MP3 only, from podcast hosts to school portals
- Desktop converters full of ads, bundled installers and daily limits
- Folders of mixed formats that have to be converted one file at a time
What You Get With This Free MP3 Converter
Everything a modern audio file converter should do, without the downloads, sign-ups or watermarks.
Any Audio Format In
FLAC, OGG, OPUS, AAC, M4A, WEBM and WAV all go in the same box, and MP3 too when you want a smaller copy. The converter reads whatever your browser can decode and turns it into a clean MP3.
Bitrate From 128 to 320 kbps
Choose 128 kbps for speech, 192 for everyday listening or 320 for music. The output size updates before you convert, so there are no surprises.
Batch Conversion
Add a whole folder at once. Every file gets its own progress bar, and you can download each MP3 on its own or everything as a single ZIP.
Private by Design
Conversion runs on your own computer or phone. Your audio is never uploaded, so it works for interviews, medical notes and unreleased music alike.
Tags and Cover Art
Set the title, artist, album and cover image and they are written into the MP3, so your music library and podcast apps show the right details.
Free With No Daily Limit
Free: convert audio to MP3 as often as you like. There is no account, no watermark and no counter of conversions left. Because your device does the work, you can convert as many files as you like.
How to Convert Audio to MP3 in Three Steps
As an online converter, audio to MP3 takes a few clicks. This is how to convert an audio file to MP3 format on any computer or phone, with nothing to install.
- 1
Add your audio files
Drag files into the box at the top of the page or click to pick them. Add one recording or a whole batch; each file joins the queue with its name, length and estimated MP3 size.
- 2
Choose the MP3 settings
In the audio converter, MP3 is the default output. Pick the bitrate, keep or change the sample rate, switch to mono for speech, and trim, fade or normalize if you need to. Add tags and cover art for music.
- 3
Convert and download
Press Convert and watch each file finish. Download a single MP3 or the full set as a ZIP, or send any file straight to transcription if you want the words as text too.
Features of the EzTranscriber Audio Converter
Built for real libraries: mixed formats, large files and recordings you would rather keep private.
Convert Audio to MP3 From FLAC, OGG, AAC and More
This audio format converter accepts the formats people actually have: FLAC rips, OGG and OPUS voice notes, AAC and M4A from phones, WAV from recorders and the audio inside WEBM files. Turn FLAC into MP3 for a car or a phone (FLAC to MP3 320 kbps keeps nearly every detail), or turn a voice note into a small MP3 you can share anywhere. It works as a voice note to MP3 converter, a recording to MP3 tool and a general audio converter to MP3 in one place. WAV and M4A have their own pages, the WAV to MP3 converter and the M4A to MP3 converter, with tips for those formats.
Choose Your FilesA Batch MP3 Converter With One ZIP Download
Converting audio files to MP3 one by one wastes an afternoon. Drop a whole folder into the queue and the tool processes the files one after another, each with its own progress and size. Remove a file, cancel the batch or change the settings before you start. When it is done, download each MP3 separately or press one button for a ZIP of the whole set. Online free audio converter to MP3 tools often cap you at one file or a few per day; this is an MP3 converter, no limit on the number of files, with each file up to 1 GB and 60 minutes long.
Convert a BatchCompress MP3 Files and Pick the Bitrate
An MP3 can go in as well as come out. Drop a large MP3 and save it again at a lower bitrate to compress MP3 audio files for email, a website or a phone that is running out of space. A 320 kbps file saved at 128 kbps shrinks to about 40 percent of its size, which is often all you need to compress an MP3 file for speech. Use it to reduce MP3 size for an upload form or to compress MP3 files in bulk; the estimate shows the new size before you convert, so you can compress MP3 file size precisely. To compress MP3 size online for a whole folder, add every file to the queue.
Compress an MP3Tags, Cover Art, Trim and Normalize Built In
Online MP3 tagging is part of the converter: type a title, artist and album, drop in cover art, and every MP3 carries it into iTunes, Android players and podcast apps. Before you convert you can also trim silence from the start or end, add a short fade, and normalize quiet recordings so they play at a sensible volume. For a bigger lift, the volume booster has loudness targets for podcasts and streaming.
Add Tags and ConvertMP3 Converter Example: How Big Will Your MP3 Be?
Pick a length and a bitrate to see the size of the MP3 the converter will make, next to the same audio as WAV.
MP3 size calculator
Length and bitrate decide the size of every MP3
Recording
MP3 bitrate
Your MP3
43.2 MB
MP3 192 kbps43.2 MB
WAV (CD quality)318 MB
Smaller than WAV
86%
Email (25 MB)
Too large
The converter above shows this estimate for every file before you press Convert.
MP3 size depends only on bitrate and length, which is why the converter can show it before you press Convert. Speech sounds clear at 128 kbps in mono; music deserves 256 or 320 kbps. Whatever you choose, the file stays far smaller than uncompressed audio, which is the main reason to use MP3 at all.
MP3 vs FLAC vs OGG vs AAC: Which Format Should You Use?
FLAC vs MP3, OGG vs MP3 (or simply OGG or MP3 for voice notes), FLAC vs AAC: every format trades size for quality in a different way. Here is how the common ones compare.
| MP3 vs FLAC vs OGG vs AAC: Which Format Should You Use? | MP3 | FLAC | OGG and OPUS | AAC and M4A | WAV |
|---|---|---|---|---|---|
| Compression | Lossy | Lossless | Lossy | Lossy | None |
| Size per minute (stereo) | 1 to 2.4 MB | 5 to 7 MB | 0.5 to 1.5 MB | 1 to 2 MB | About 10 MB |
| Plays on almost every device | |||||
| Best for | Sharing, cars, players | Archiving music | Voice notes, web | Apple devices | Editing, studios |
| Converts to MP3 here |
Who Uses an Audio to MP3 Converter
From music fans to teachers, people convert audio to MP3 so one file works on every device they own.
Podcasters
Export from any recorder, save MP3 at the bitrate your host expects and normalize the level before you publish.
Voice Notes and Recordings
Save OGG and OPUS voice notes as MP3 for safekeeping, or record something new with the online voice recorder.
Teachers and Students
Shrink lecture recordings to small MP3s that upload quickly to a class portal and play on any laptop or phone.
Video Creators
An MP3 audio converter is handy for music and voiceovers that go into editing apps. Need the sound from a clip? Use video to MP3.
Researchers and Journalists
Convert interviews to MP3 without uploading them anywhere, then turn the words into text with MP3 to text.
What People Say About Our MP3 Converter
My car only plays MP3. I dropped forty FLAC albums into the queue, picked 320 kbps and had a ZIP ready while I made coffee, cover art included.
Marco Bellini
Music Collector
I teach online and students send voice notes in every format imaginable. This tool turns them all into one format I can actually grade.
Ruth Adeyemi
Language Teacher
Our podcast host wanted MP3 under a size limit. Saving the episode again at 64 kbps mono got it under the limit, and nothing left my laptop.
Owen Price
Podcast Editor
I tried three converters full of pop ups. This one just works in the browser, shows the file size before converting and never asks me to sign up.
Lina Haddad
Office Manager
MP3 Converter FAQs
Answers to the most common questions about converting audio to MP3.
What is an MP3 converter?
An MP3 converter decodes audio in another format and encodes it again as MP3, the most widely supported audio format. EzTranscriber does this in your browser, so the files never leave your device.
Is this MP3 converter really free?
Yes. It costs nothing, with no account, no watermark and no daily counter, because the conversion runs on your own device instead of our servers. It is the best free audio converter for people who want a quick result without installing anything.
How do I convert an audio file to MP3 format?
Add the file to the box at the top of this page, choose a bitrate such as 192 kbps, press Convert and download the MP3. That is all it takes to convert an audio file to MP3 format on Windows, Mac, Chromebook, Android or iPhone.
Which formats can I convert to MP3?
Any format your browser can decode. In Chrome and Edge that means MP3, WAV, FLAC, OGG, OPUS, AAC, M4A and the audio in MP4, MOV and WEBM; Safari reads most of them but not WEBM or OGG. AIFF depends on the browser, and AVI and WMA are not supported. If a file cannot be read, the queue says so clearly instead of failing silently.
Can I convert MP3 to WAV?
Yes. Choose WAV as the output and the tool works as a music file converter: MP3 to WAV for editing software that wants uncompressed audio. It is also an MP3 to audio converter for that one job, although WAV cannot restore detail the MP3 already removed.
Which bitrate should I choose?
Use 64 or 128 kbps for speech, podcasts and lectures, 192 kbps for everyday music, and 256 or 320 kbps when you start from a lossless file such as FLAC. A 320 kbps MP3 converter setting gives the best quality MP3 can offer.
FLAC or MP3: which is better?
FLAC is lossless and about three times larger; MP3 is smaller and plays everywhere. Keep FLAC as your archive and convert copies to MP3 for phones, cars and sharing. FLAC vs MP3 at 320 kbps is hard to tell apart for most listeners.
Can I compress an MP3 file?
Yes. Add the MP3 and save it at a lower bitrate, for example 320 to 128 kbps, or use 64 kbps mono for speech. The new size is shown before you convert, so you can compress MP3 files to fit an upload limit.
How long does the conversion take?
MP3 encoding runs at roughly ten times real time in a typical browser, so a three minute song takes well under a minute and an hour long recording a few minutes. WAV output is almost immediate. Files convert one at a time, and a faster computer finishes sooner than a phone.
Are my files uploaded anywhere?
No. The free online audio converter runs entirely in your browser. Files are read from your device, converted there and saved back to your device, so private recordings stay private.
Is there a file size or number of files limit?
There is no daily limit and no limit on how many files you add. Each file can be up to 1 GB and 60 minutes long, and very large files also depend on the memory of your device, so a phone handles less than a laptop. The queue tells you if a file is too large.
Can I get the words in an MP3 as text?
Yes. After converting, press Transcribe on any file to send it to the AI transcriber, or start from our audio to text converter. Transcription needs a free account and uses credits.
More Audio Converters
Pick the converter that matches your file.
Convert Your Files With the Free MP3 Converter
Drop in any audio file, pick a bitrate and download your MP3. No sign-in, no upload and no daily limit, and everything runs in your browser.