File.io
File.io is an ephemeral file sharing API that enables developers to upload files and share them via automatically generated links that self-destruct after the first download. Unlike traditional cloud storage services that retain files indefinitely until explicitly deleted, File.io is designed for one-time, privacy-preserving file handoff between parties — once the recipient downloads the file, the link and the file are permanently deleted from File.io's servers.
The core use case for File.io is secure single-use file delivery: when a file needs to reach exactly one recipient without persisting in shared storage afterward, File.io provides a simple solution. The workflow is minimal: upload a file via HTTP POST, receive a shareable link, send that link to the recipient, and the file is automatically purged after the first download. No account is required, no long-term storage accumulates, and no stale file links persist after their purpose is fulfilled.
File uploads to File.io are performed through a simple multipart HTTP POST request to the API endpoint. The response returns a JSON object containing the unique download URL, the file expiration settings, and metadata about the upload. The API accepts files of any type up to the plan-specific size limit. On the free tier, files can be set to expire after a specified duration even if never downloaded, providing a time-based backup expiry for files shared but not claimed.
Expiration policies can be configured at upload time: the file can expire after a set number of days or after a set number of downloads. On paid tiers, the download limit can be increased beyond one, and the expiration period can be extended. This flexibility allows File.io to serve both the strict one-time-download use case and more permissive temporary sharing scenarios where a small group of recipients all need to download the file before it expires.
For Nigerian developers building document submission workflows, File.io provides a useful drop-off mechanism. Applications that need to accept document uploads from users — job application portals collecting CVs, government systems collecting form submissions, educational platforms receiving assignment files — can use File.io to receive the file and generate a temporary link that can be stored as a pointer in the application's database. The actual file content then resides temporarily on File.io until retrieved by the processing system, without requiring permanent storage management on the application side.
Data transfer between two backend systems that need to exchange files without setting up shared cloud storage can use File.io as a temporary file shuttle. System A uploads the file, passes the link to System B through an existing API or message queue, and System B downloads and processes the file. After this handoff, the file no longer exists on File.io. This pattern reduces the complexity of managing shared storage permissions and cleanup policies for transient inter-system file transfers.
Nigerian developers handling sensitive documents — KYC documents, confidential agreements, financial statements — that need to reach a specific recipient without lingering in shared storage appreciate File.io's automatic deletion guarantee. Unlike sending files over email (which keeps copies in multiple mail servers) or sharing via persistent cloud links (which remain accessible until manually revoked), File.io provides assurance that the file is gone after the download completes.
The API is accessible without authentication for basic usage, with rate limits applied by IP. The simplicity of the API — a single POST endpoint for upload and an automatically generated URL for download — means integration is achievable in minutes with any HTTP client in any language. No SDK is required; a simple curl command or a fetch call in JavaScript is all that is needed to integrate file sharing into a Nigerian application workflow.
For transient workflows, quick document handoffs between colleagues, and privacy-conscious single-use file transfers, File.io fills a niche that general-purpose cloud storage is not designed for, offering ephemeral storage with automatic deletion as a feature rather than a limitation.