Add Cover Art to Your Audio
Choose an MP3 or M4A file and an image, check the tags, then download the file with its new cover art.
Add album art or podcast episode art to an MP3 or M4A right in your browser, no upload, no watermark, no sign up
Choose an MP3 or M4A file and an image, check the tags, then download the file with its new cover art.
100% Private, your audio never leaves your browser. The tool works locally on your device using WebAssembly. Nothing is uploaded to our servers.
This tool runs FFmpeg, the industry‑standard media toolkit, compiled to WebAssembly so it runs entirely inside your browser. It crops your image to a square JPG at the size you choose, then puts it into your file with the new tags. The audio is copied as it is, so the sound does not change. No account, no watermark, no server queue.
The first time you choose a file, the tool downloads the media engine (~30MB) to your browser and caches it, so later files start instantly. A stream copy is fast, so most podcast episodes are ready in a few seconds.
Want to make episode art or video clips automatically at scale? The Bannerbear API automates it for you. Plug it into your app or no‑code workflow and make the art for every episode on autopilot.
Cover art is an image that is stored inside an audio file. Apps that read the file can show it.
In an MP3 file, the cover art and the tags are in the ID3 tag at the start of the file. In an M4A file, they are in the metadata of the file. The image is not part of the audio, so you can change it without a change to the sound.
This tool copies the audio as it is (a stream copy). The bitrate, the length and the sound do not change.
You can add cover art in less than a minute. You do not need to install software or make an account.
To keep the cover art that the file has and change only the tags, do not choose an image. To save the cover art that is in the file now, click Download Current Art.
The tool also gives you the new cover art as a JPG. Upload this JPG to your podcast host as the episode art.
Apple Podcasts has clear rules for episode art. The tool makes art that follows them.
| Rule | Apple Podcasts | This tool |
|---|---|---|
| Shape | Square | Crops the center of your image to a square |
| Size | 1400 x 1400 to 3000 x 3000 px, the largest is best | 1400, 2000 or 3000 px |
| Format | JPG or PNG | JPG |
| Transparency | Not allowed, no alpha channel | Fills transparent areas with a solid colour |
The common questions about adding cover art to an MP3 or M4A file, and their answers
No. The tool runs in your browser, and your file stays on your device. We do not see it, and we do not keep a copy.
No. The tool copies the audio as it is (a stream copy). It does not encode the audio again, so the bitrate, the length and the sound stay the same. Only the cover art and the tags change.
Apple says that you upload episode art through RSS, with your podcast host. After you save, click Download Art (JPG) and upload that JPG to your host as the episode art. The art in the file shows in apps that read the file itself, for example the Finder preview (Quick Look) on a Mac.
Apple asks for 1400 x 1400 to 3000 x 3000 px, and prefers the largest size. Choose 3000 x 3000 px unless your image is small. A smaller size makes a slightly smaller file.
Apple does not allow transparency in episode art, and a JPG cannot have an alpha channel. The tool fills the transparent areas with the Background colour, which is white at first. Choose a different colour if you want one.
The tool keeps the center of your image and removes equal parts from the two long sides. To keep a different part, crop the image in an image editor first.
Yes. When you choose a file that has cover art, the tool shows it. Click Download Current Art to save the image. The tool saves it as it is in the file, as a JPG or a PNG.
The title, the artist, the album and the episode number. The tool saves the episode number as the track number. It keeps the other text tags of the file, for example the year and the genre.
MP3 and M4A files, up to 500 MB on a computer and 250 MB on an iPhone or iPad. For the image, use a PNG, JPG or WEBP file. To use a WAV, FLAC or OGG file, change it to MP3 with the media converter first.
Yes. The tool is free, with no watermark, no signup and no limit on the number of files.
Do you publish a new episode every week? Bannerbear makes the art and the video clips for each episode from your templates, with one API call.
This free tool is good for one file at a time. With Bannerbear, the episode number, the title and the guest come from your planning sheet, and the artwork renders from your template in every size that the platforms need. The Video API also makes subtitled clips and animated intros for each episode.
See what Bannerbear does for shows like yours on the Bannerbear for Podcasts page. To learn how, read these guides:
Do you need a different audio format? Use the media converter to change a WAV or FLAC file to MP3, then add the cover art here.
Trim, resize, caption and combine your videos right in your browser, no upload and no watermark
Start a free trial with 30 API credits, no credit card required
