About

Calderbin is a file storage and transfer service. You upload a file, get a link and send it on. The link lasts 24 hours, the file is kept for 14 days and is then deleted automatically.

We are a small team and the service is growing steadily. We keep it deliberately plain: no folders, no tags, no collaborative editing, no mobile apps. One job — move a file across and not leave it lying around forever.

How storage works

• A file is reachable by you and by whoever you sent the link to. There is no shared catalogue and no search across other people's files.
• Retention and link lifetime are counted automatically. Expired files are removed from disk together with their records.
• Passwords are stored as hashes — the original cannot be recovered, not even by us. It can only be replaced.
• Uploading requires a signed-in account. That limit is deliberate: it is what lets us stay accountable for what sits on the servers.

What we do not do

• We show no advertising and embed no third-party counters or trackers.
• We do not pass data to third parties and do not sell statistics.
• We do not inspect file contents for recommendations or advertising.
• We send no email other than replies to your own messages.

Current state

Live figures and plan limits are published on the status page. The same data is available to machines at /api/v1/status.

Contact

Use the support button in the bottom-right corner. Leave your email with the message and we will write back to you — a person reads every one. Quota increases are requested from your account after signing in.