Filestack
The best file uploader and upload API
Filestack is a file infrastructure platform that provides upload, transformation, storage, and delivery through a single API. It addresses the need to build and maintain separate upload services, processing workers, and CDN configuration by combining ingestion, processing, and delivery into one integration.
Core capabilities include a drop-in File Picker supporting 20+ upload sources, URL-based image and document transformations across 100+ formats, smart crop, filters, watermarks, and document processing. Filestack Intelligence provides AI features such as OCR, object detection, image and video SFW moderation, captioning, virus detection, and phishing detection. Workflows chain upload, transform, and deliver steps into reusable jobs, while a global CDN handles adaptive delivery with signed URLs and access policies. Security includes policies, signatures, path-based restrictions, and domain whitelisting. SDKs are available for JavaScript, React, Angular, Python, PHP, Java, Ruby, Go, Swift, and WordPress.
Filestack is aimed at engineering teams building applications that handle user-generated content, including SaaS platforms, EdTech, print production, and content management systems. It offers a free plan, with additional plans and a custom plan available by quote; limits on file size and storage vary by subscription plan.
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