File.io API
Overview
File.io is an ephemeral file sharing API that returns a one-time download link after upload — once the file is downloaded, it is automatically deleted from the server. No account or API key is required for basic use, and file expiry can be controlled via a query parameter. This makes it ideal for securely passing temporary files between processes or services.
Beginner Tip
Upload any file with a single curl command and receive back a JSON response with a shareable link. By default the link expires after one download, but you can set a duration like ?expires=1d or ?expires=1w for multi-download scenarios.
Available Data
The kind of data this API exposes, based on its documentation. We could not call the endpoint to confirm the exact field names.
Example Response
Illustrative shape only — we were not able to call this endpoint (it requires credentials or exposes no public sample URL), so the fields below show the kind of data this API returns rather than a recorded response.
{
"file_id": "f_abc123",
"filename": "document.pdf",
"size_bytes": 1048576,
"mime_type": "application/pdf",
"download_url": "https://example.com/files/f_abc123",
"created_at": "2025-01-15T10:00:00Z"
} Field Reference
success true if the file was uploaded and the link was generated successfully link One-time download URL for the uploaded file, valid until downloaded or expired key Short unique identifier for the file used to construct the download URL expiry ISO 8601 datetime when the file and its link will be permanently deleted size Size of the uploaded file in bytes Implementation Example
Calls a real endpoint of this API. Replace any placeholder credentials with your own key.
const url = "https://file.io/?expires=1d";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
Common Errors & Troubleshooting
Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.
Metadata Score Breakdown
Estimated from metadata — endpoint not independently tested
Metadata estimate · endpoint not independently tested
Technical Specifications
Related Tags
Similar APIs
View All →Pantry
⭐ Beginner's PickPantry is a free, no-signup JSON storage API designed for small projects and prototypes that need simple key-value persistence without a database.
Box
Box is an enterprise cloud content management platform with a comprehensive API for uploading, downloading, organizing, and sharing files programmatically.
Pinata
Pinata is an IPFS pinning service API that lets you upload files to the InterPlanetary File System and keep them persistently accessible by "pinning" them on Pinata's infrastructure.
GoFile
⭐ Beginner's PickGoFile is a free file hosting API that lets you upload files of any size without an account and receive a generated download link in return.
Gyazo
Gyazo is a screenshot hosting API that accepts an image upload and returns a permanent shareable URL with associated metadata like capture time and application info.