Easy file uploads for your apps
S3-backed file storage with a simple REST API. Get started in minutes, migrate to your own bucket later if needed.
Ready-to-use API • Automatic organization • Secure cloud storage
curl -X POST https://attach.fast/api/files \
-H "Authorization: Bearer YOUR_API_KEY" \
-F "file=@photo.jpg" \
-F "folder=gallery/photos"
# Returns
{
"id": 123,
"token": "photo.jpg",
"filename": "photo.jpg",
"content_type": "image/jpeg",
"file_size": 524288,
"url": "https://attach.fast/rails/active_storage/blobs/redirect/...",
"download_url": "https://attach.fast/rails/active_storage/blobs/redirect/...",
"folder": {
"id": 456,
"name": "photos"
},
"created_at": "2025-12-30T21:30:00Z",
"updated_at": "2025-12-30T21:30:00Z"
}Why choose attach.fast?
Everything you need for file uploads, nothing you don't
Setup in Minutes
Get an API key and start uploading files immediately. Simple integration with any programming language or framework.
Smart Organization
Automatic folder creation, hierarchical structure, and intelligent file naming. Keep your uploads organized without the hassle.
Secure & Reliable
Built-in authentication, secure file handling, and reliable cloud storage. Your files are safe and accessible 24/7.
RESTful API
Clean, well-documented REST API. Upload, list, update, and delete files with simple HTTP requests from any language or framework.
Perfect for Teams
Multiple sites, user avatars, document uploads, asset management. Perfect for any app that needs file handling.
Scales With You
From prototype to production, attach.fast grows with your app. Start small, scale big, pay only for what you use.
Perfect for common use cases
From user avatars to document management, we've got you covered
User Avatars & Profiles
Let users upload profile pictures with automatic folder organization by user ID.
Document Management
Handle PDFs, contracts, invoices, and reports with proper folder hierarchies.
Image Galleries
Upload and organize product images, portfolio pieces, or media assets effortlessly.
File Backup & Storage
Reliable cloud storage for any type of file your application needs to handle.
Get started in 3 simple steps
No complex setup, no lengthy configuration. Start uploading files in minutes.
Create your account
Sign up and create your first site to get your API key.
Add the API to your code
Use our simple REST API from any programming language or framework.
Start uploading files
That's it! Your files are automatically organized and ready to use.
Ready to simplify your file uploads?
Join developers who choose simplicity and reliability for their file uploads
Free to start • No credit card required • Ready in minutes