LOCAL FILE READINESS CHECKER
Check the file before the upload form rejects it.
Pick a file and a destination. FastTool reads only local metadata and the first bytes in your browser, then checks size fit, file signature, privacy risk, and the best workflow to finish the job. Nothing is uploaded to FastTool.
Local file scan
Select a PDF, image, video, audio, JSON, CSV, or office-style file
The checker reads file name, size, MIME type, and a tiny signature slice locally. It does not upload file contents.