Convert any MP3 directly from a URL.
Append a ?url= parameter to this page and the MP3-to-MP4 converter opens with your song pre-loaded, ready for a cover image and a resolution. The audio is fetched server-side, so CORS restrictions on the source host don't apply.
How to use
Single MP3
The page fetches the audio file on the server, opens the converter, and drops you straight into the configure step — pick a cover image, resolution, and fit, then convert.
https://mytools.com/audio/mp3-to-mp4/by-url?url=https://example.com/song.mp3
Only one MP3 per session
This tool converts one song at a time because video encoding is memory-heavy in the browser. The ?url= parameter accepts a single audio URL; additional ?url= values are ignored.
Requirements
| Protocol | http:// or https:// only |
| Content-Type | audio/* or application/octet-stream |
| Source | Any publicly accessible URL |
| Formats | MP3, WAV, M4A, AAC, OGG |
Server-side fetch · No CORS restrictions · Works with any public MP3 URL
Why convert from a URL?
Skip the upload step
When your MP3 is already hosted somewhere — a CDN, Bandcamp, an RSS feed — pass the URL directly instead of downloading then re-uploading. The converter opens with the audio ready to pair with artwork.
No CORS restrictions
The page fetches the audio file server-side, so cross-origin rules on the source host don't get in the way — even for files served without permissive CORS headers.
Shareable and linkable
The URL is the session. Copy it, send it to a collaborator, and they'll open the exact same MP3 ready to convert — handy for chat handoffs and tickets.
Fits into automated workflows
Generate the by-url link programmatically from a CMS, a publishing pipeline, or a bulk script so the converter becomes a drop-in step wherever you produce finished MP3s.
Great for podcast clips
Paste an episode URL from your hosting provider and the converter opens instantly, ready to wrap it in a square video with your podcast logo for Instagram or TikTok.
Same converter, different door
Every option from the main tool — resolution presets, fit modes, background colour, custom filename — works identically once the MP3 has loaded.
How it works
Build the URL
Start with /audio/mp3-to-mp4/by-url, then append ?url= followed by the full address of the MP3 you want to convert.
The audio loads automatically
Open the URL in your browser. The server fetches the MP3 and the converter opens with the track ready, skipping the upload screen.
Add a cover, pick settings, and convert
Choose a cover image, a resolution, an image fit, then hit Convert and download the finished MP4.
Frequently asked questions
- Audio files are never stored — fetched and forwarded in a single request.
- URLs and audio are not logged, inspected, or retained.
- No sign-up needed — construct the URL and go.