Merge any audio files directly from URLs
Append ?url= for each audio file address and the merger opens with all files already loaded — no upload step. Files are fetched server-side, so browser CORS rules don't apply.
How to use
Single audio file
The page loads, the server fetches the audio, and the merger opens with the file ready in the track list. (Useless on its own — pair it with at least one more URL.)
https://mytools.com/audio/merge-audio/by-url?url=https://example.com/intro.mp3
Multiple audio files
Repeat the ?url= parameter for as many files as you need. They appear in the track list in the order you list them, and you can still reorder before merging.
https://mytools.com/audio/merge-audio/by-url?url=https://example.com/a.mp3&url=https://example.com/b.mp3&url=https://example.com/c.mp3
Requirements
| Protocol | http:// or https:// only |
| Content-Type | audio/* or application/octet-stream |
| Source | Any publicly accessible URL |
Server-side fetch · No CORS restrictions · Same merger, instant load
Why pass URLs instead of uploading?
Skip the upload step
When you already have URLs — from your CDN, a podcast feed, or a public bucket — there's no reason to download each file just to upload it again. Pass the URLs and start merging.
No CORS restrictions
Files are fetched server-side, so it doesn't matter whether the host sets Access-Control-Allow-Origin. URLs that fail in client-only tools work fine here.
True batch from a list of URLs
List as many ?url= parameters as you need — the merger receives them all at once and shows them in your specified order, ready to reorder, fade, and combine.
Shareable and linkable
The URL is the entire session — share it with a teammate and they land on the same merger, with the same files loaded, ready to combine.
Same merger, different entry point
You get the full workspace: drag-and-drop reordering, crossfade presets, fade in / fade out toggles, and same-format output. The only difference is how the files got there.
Fits into automated workflows
Generate the by-url link from a script, a Slack bot, or a CMS button — anywhere you already have a list of audio URLs. The merger becomes a one-click step in a longer pipeline.
Build the URL
Start with /audio/merge-audio/by-url, append ?url= and the full audio address. Repeat the parameter for each file. URL-encode addresses with their own query strings.
The files load automatically
Open the URL in any browser. The page fetches each file server-side, decodes their durations, and opens the merger with everything ready.
Reorder, tweak, and merge
Adjust the track order, pick a crossfade or fades if you want, hit Merge audio, and download the combined clip — same flow as the regular tool.
- Audio files are never stored — fetched and forwarded in a single request.
- URLs and audio content are not logged, inspected, or retained.
- No sign-up needed — construct the URL and go.