The Best File Uploader & Upload API - Filestack

# Filestack > Filestack is a file management API platform for developers: file uploads via a drop-in File Picker with 20+ sources (local device, URL, Google Drive, Dropbox, Instagram, and more), URL-based transformations, CDN delivery, and AI-powered intelligence (OCR, image tagging, virus and phishing detection). SOC 2 compliant, used by 100,000+ applications, with SDKs for JavaScript, React, Angular, Python, Java, PHP, Ruby, Go, and Android. Filestack's Content Ingestion Network (CIN) makes mobile uploads up to 100x more reliable by returning a filelink instantly while asynchronously moving files to your storage. Transformations are applied via URL (e.g. cdn.filestackcontent.com/APIKEY/resize=height:200/HANDLE) before files reach your app. Free and paid plans are available at https://www.filestack.com/pricing/. ## Getting Started - [Filestack Homepage](https://www.filestack.com/): Main site - upload, transform, and deliver files at scale - [What is Filestack?](https://www.filestack.com/docs/getting-started/what-is-filestack/): Technical and non-technical introduction to the Filestack platform - [How Filestack Works](https://www.filestack.com/docs/getting-started/how-filestack-works/): Architecture overview - upload, transform, and delivery flow - [Quick Start](https://www.filestack.com/docs/getting-started/quick-start/): Get an API key and integrate the File Picker with two lines of code - [What's New / Changelog](https://www.filestack.com/docs/getting-started/whats-new/): Latest API, picker, and SDK updates ## Uploads - [File Pickers](https://www.filestack.com/docs/uploads/pickers/): Embeddable upload UI; File Picker 4.0 supports folder uploads with preserved structure - [Uploading](https://www.filestack.com/docs/uploads/uploading/): Direct and multipart upload APIs, URL ingestion - [Drag and Drop](https://www.filestack.com/docs/uploads/dnd/): Lightweight drag-and-drop upload integration - [Custom Source](https://www.filestack.com/docs/uploads/customsource/):