Read docs Updated 2026-06-15
What is Filestack?
Filestack is a file uploader and file upload API for integration into software projects.
It is useful for developers who need to add file upload capabilities to web or mobile applications.
What you can build with Filestack
Add file uploads to web forms
Embed a picker widget in a website so users can upload documents or images directly from local drives or cloud sources.
Handle user-generated content in apps
Use the upload API to receive and store files submitted by users in mobile or web applications.
Secure file ingestion for SaaS platforms
Integrate the API to accept and manage file submissions within business tools while using API key authentication.
Get started with Filestack
- 1Sign up for a Filestack account and generate an API key
- 2Include the Filestack client library or SDK in your project
- 3Initialize the uploader component with your API key
- 4Configure upload parameters and event callbacks
- 5Process the returned file handle or URL in your application
Filestack: pros & cons
Pros
- +Simple API key authentication
- +HTTPS connections by default
- +Purpose-built for file uploads
- +Works across web and mobile
Cons
- –Third-party service dependency
- –Usage-based pricing applies beyond free limits
- –Requires managing API keys securely
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Filestack is a file uploader and file upload API that lets developers add file handling to applications.
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