Reclaim the space
Signal won't let go
Signal Desktop quietly keeps every photo, video and file you've ever received — often 10–30 GB. Sigweeper lets you review them and clear them. All on your Mac.
Signal never deletes what it downloads
Every attachment is saved to disk and kept forever — there's no button in Signal to clear them. Over months of group chats and shared videos, it quietly becomes tens of gigabytes you can't easily see or reclaim.
Three simple steps
No setup, no accounts. Open it and reclaim your space.
Scan
Sigweeper reads your own local Signal library and lists every stored attachment, biggest first.
Preview
See thumbnails, video frames and document peeks — decrypted locally — so you know what a file is before it goes.
Sweep
Select what you don't need and remove it. Your message history stays intact — only the heavy files on disk are gone.
Your messages never leave your Mac
Sigweeper touches some of the most private data you own, so it's built to do the least possible. Your attachments, messages and keys are read, decrypted and deleted entirely on your Mac and are never uploaded anywhere. The single exception is an update check: Sigweeper asks sigweeper.com whether a newer version exists, so that a Signal update can't leave you stranded on a broken build. That request sends no personal data and carries no identifier.
- Your data never leaves your Mac
- No telemetry, no accounts
- Decrypted in memory
- You confirm every delete
Try Sigweeper
macOS · Intel & Apple Silicon · about 14 MB · nothing leaves your Mac.
Private betaFirst launch
Signed and notarized by Apple — it just opens.
- Open the .dmg and drag Sigweeper to Applications.
- Double-click it. No security warnings, no workarounds.
- Quit Signal Desktop before deleting (the app reminds you).
Sigweeper reads your Keychain once to unlock Signal's local database. macOS will ask you to allow that — everything stays on your Mac.