Renamed folders, re-copied SD cards, iPhone photo dumps, timelapse frames you don't need anymore. Spool scans your drives, finds the exact duplicates, and shows you what's safe to reclaim — before you touch a single file.
Anyone who's shot on more than one camera, switched phones, or moved a folder "just in case" ends up here.
You moved the same folder twice, got an overwrite warning, and made a new folder instead of dealing with it. Now you have both.
Every iCloud export or phone swap adds another dump folder with its own copies of photos you already have.
Two different cameras reset their own file numbering to 0001 on the same shoot day — filenames collide even though the content doesn't match.
You kept every source photo from a timelapse you already exported as a video. That's gigabytes doing nothing.
Spool hashes files and compares the actual bytes — so C0001.MP4 from your Sony and C0001.MP4 from your DJI are correctly seen as different, while that photo you copied into three folders is correctly seen as the same file.
Any folder with dozens of sequentially shot photos gets flagged, especially when a finished video already sits next to it. Review the folder, keep the video, clear the frames.
Point Spool at a fresh SD card and it organizes, renames, and copies straight into your library using the same duplicate-safe logic — verified checksums, optional backup mirror, nothing deleted from the card unless you say so.
Spool scans and reports first. Every delete is a deliberate, reviewed step.
Runs entirely in your browser against files on your own drives. Nothing is uploaded, nothing leaves your machine.
Files you approve for removal move to a _SpoolTrash folder inside their own drive — not a permanent delete, and not your OS Recycle Bin (browsers can't reach that). Review or empty it yourself.
Duplicate matches are confirmed with SHA-256 hashing on full file contents, not just filename or size.
Nothing is auto-deleted. Every duplicate set and every flagged folder waits for your checkbox.
Free to scan. No account, no upload, no catch.