Tools
Free tools
Four helpers that run entirely in your browser. No account, no upload, no installation.
The short answer
Your files never leave your machine.
Every tool on this page works purely locally. There is no upload, no server request and no storage. The two file-based tools additionally read only the first bytes, not the whole file.
Overview
All tools
These tools answer questions that matter before a recovery: is this really the file type the extension claims? Does the card have the capacity it states? Is a software attempt worthwhile at all? And which file system is inside the image?
Check first, act second.
Start with an assessment of your recovery chance.