- Extension database: Search detailed records for unfamiliar file extensions and the programs associated with them.
- Online file viewer: Upload a supported file for browser-based identification and preview.
- File analysis: Detect a file type even when its name or extension is unclear.
- Opening guidance: Find applications that can open, edit or convert a format.
- No installation: Use the lookup and preview tools in a web browser.
FILExt
Comprehensive online database for identifying and understanding file extensions
Updated August 11, 2026
FILExt Overview
FILExt is a browser-based reference for identifying file extensions and finding applications that can open them. Users can search the extension database or upload a supported file for identification and preview.
It is useful when a file has an unfamiliar or missing extension and someone needs a quick way to understand it. FILExt is a lookup and preview service, not a full desktop file manager or editing suite.
Key Features
Pricing
| Plan | Price | Featured |
|---|---|---|
| Free access | $0 | Extension lookups, file analysis and online preview for supported formats |
FILExt provides its extension database and online file viewer without a published subscription fee. No paid plan was shown on the official site.
Pricing source: FILExt official site
Pros
| Compared with | Why this product may fit better |
|---|---|
| FileInfo | FILExt combines extension records with a drag-and-drop online preview. FileInfo has a strong reference database, but FILExt can sometimes identify and show the uploaded file in the same visit. |
| File-Extensions.org | FILExt gives a visitor both program suggestions and an online viewer for many formats. File-Extensions.org leans more heavily on reference pages, so it may take another app to inspect the actual file. |
| OpenWith.org | FILExt covers a much larger current database and works entirely in the browser. OpenWith.org is a simpler directory, while FILExt is more useful when an extension is obscure or missing. |
Cons
| Compared with | Where this product may fall short |
|---|---|
| FileInfo | FileInfo offers polished format pages and links to its own desktop and mobile file tools. FILExt's pages can feel more crowded, and a privacy-sensitive user may not want to upload an unknown file for preview. |
| File-Extensions.org | File-Extensions.org often provides long technical descriptions and related extension lists. FILExt gets to identification quickly, but its shorter page may not answer a specialist's deeper format questions. |
| OpenWith.org | OpenWith.org keeps the task narrow: find software that opens an extension. FILExt adds analysis and preview options, which is unnecessary for someone who only wants an application name. |
Reviews
- MyWOT site feedback: MyWOT comments concern the FILExt website rather than a paid software product. Some users praise its large extension database and fast identification, while older comments warn about clutter and third-party registry-scanner promotions. The mixed feedback should be read as site-reputation evidence only.
