Thumbnails in a blink
JPEGs use the photo's own EXIF thumbnail, read from the first 256 KB, and everything is cached on disk. A folder you've seen opens instantly.
Any S3-compatible storage
Works with the storage you already pay for.
Pick a preset, paste your access key and you're in. Kybl fills in the endpoint and region, tells you about each provider's quirks and can test the connection before you save it.
Amazon S3
Cloudflare R2
Hetzner
Backblaze B2
Wasabi
DigitalOcean
MinIO
Ceph
Secret keys go to the macOS Keychain, Windows Credential Manager or Secret Service. Never into a file.
Features
Your bucket list, sorted.
Everything you expect from a file manager, made for buckets that hold a hundred files or a million.
Share links in one click
Presigned links for 1 hour, 1 day or 7 days. Nothing to make public.
Drag, drop, done
Files or whole folders, straight from Finder or Explorer. Big files go up in parts.
A transfer queue that talks
Speed and time left for every upload and download. Cancel one, retry the ones that failed, keep working meanwhile.
Previews without downloading
Images, video, audio, PDF and text open right in the details panel.
Huge folders, still snappy
Lazy paging keeps 100,000-file folders smooth. Search looks through every subfolder.
Keyboard first
⌘F search
⌘A select all
⌘R refresh
⌫ up a folder
Folder sync
Keep a folder in sync, even with the window closed.
Point a local folder at a bucket and pick a direction. Kybl watches for changes, skips what you tell it to ignore and keeps going from the menu bar.
- Upload to the bucket or download from it
- Ignore rules for
node_modules,.DS_Storeand friends - Pause everything from the menu bar icon
- Errors in plain words, with the fix
Sync status
Kyblík tells you how your folders are doing.
One look at the little bucket and you know: all good, busy, resting or in need of a hand.
All syncedUp to date, nothing to do
Uploading14 of 18 files
PausedSyncing is off until you resume
Needs a handA sync error, with the fix in plain words
Questions
Good to know before you grab Kybl.
Which storage providers does Kybl work with?
Any S3-compatible storage: Amazon S3, Cloudflare R2, Hetzner Object Storage, Backblaze B2, Wasabi, DigitalOcean Spaces, MinIO, Ceph and other S3 servers. Presets fill in the endpoint and region for the common providers.
Is Kybl free?
Yes. Kybl is a free download for macOS, Windows and Linux. You use your own bucket and pay your storage provider as usual.
Where are my access keys stored?
Secret keys are stored in the operating system keychain: the macOS Keychain, Windows Credential Manager or a Secret Service such as GNOME Keyring on Linux. They are never written to a file, and Kybl talks to your storage directly.
Can Kybl sync a folder with a bucket?
Yes. Pick a local folder, a bucket and a direction (upload or download). Kybl watches for changes, skips files that match your ignore rules and keeps syncing from the menu bar when the window is closed.
Does Kybl handle very large files and folders?
Yes. Large files upload in parts (multipart upload), folders with hundreds of thousands of objects load page by page, and search looks through every subfolder.
Download
Get Kybl for your computer.
Free. Native on every platform, built with Rust and Tauri, so it starts fast and stays light.
First launch on a Mac asks once
Kybl is signed but not yet notarized. On the first launch, open System Settings → Privacy & Security and click Open Anyway. Updates keep the same signature, so you won't be asked again. On Windows, if SmartScreen warns, click More info → Run anyway. On Linux, secret keys need a Secret Service such as GNOME Keyring or KWallet.