OpenAnyFile
What is a .als file?
Ableton Live Set is an audio format developed by Ableton, first released in 2001. It is usually created by Ableton Live.
Gzipped XML: decompressed, every track, clip and device setting is readable text — which is how people recover sets that won't load.
File details
| Full name | Ableton Live Set |
|---|---|
| Category | Audio |
| MIME type | application/x-ableton-live-set |
| Signature (magic bytes) | 1F 8B (gzip) |
| Developer | Ableton |
| Introduced | 2001 |
| Opens with | Decompressor |
| Uploaded? | No — read locally in your browser |
How to open a .als file
OpenAnyFile routes .als files to its decompressor, which shows the decompressed content, opened in the right viewer.
- Drop your .als file on the box above, click it to choose the file, or paste it with Ctrl+V.
- The real format is detected from the file's first bytes — not just its name.
- The file opens in the decompressor.
- Use fullscreen for a closer look, check its checksums, or download it back unchanged.
What works — and what does not
Works
Viewing and inspecting: the decompressed content, opened in the right viewer. Size, type, signature and checksums are always shown.
Does not work
Editing and saving back. OpenAnyFile is a viewer, not an editor — for changes you still need the original app.
Is it safe to open a .als file online?
Here, yes — because nothing is uploaded. Most "online viewers" send your file to their server. OpenAnyFile reads it with your browser's File API and decodes it on your own device, so there is no copy anywhere else. You can check: open your browser's network tab while opening a file — no upload appears.
Questions about .als files
Can I open a .als file without installing software?
Yes. OpenAnyFile opens .als files in your browser using its decompressor. You get the decompressed content, opened in the right viewer, with nothing installed and no account.
How do I know a file is really a .als file?
Check its first bytes instead of its name. A genuine ALS file begins with 1F 8B (gzip). OpenAnyFile shows the detected type, so a renamed file is easy to spot.
Is my .als file uploaded anywhere?
No. The file is read locally by your browser and never sent to a server — it even works offline once the page has loaded.
Does it work on phones?
Yes — on Android and iPhone, in any modern browser. You can also install OpenAnyFile as an app.
Related formats
Other formats from the same family:
Format facts checked and page updated on September 25, 2026.