Why attach.fast?
A simple API wrapper around S3 that handles file uploads, folder organization, and multi-tenant security. You can migrate to your own bucket when needed.
The problem with file uploads
File uploads require configuration and code that most apps need but don't want to build
S3 Configuration
Setting up AWS S3 buckets, IAM policies, CORS, and SDK configuration. This takes time and requires AWS knowledge.
File Organization
Creating folder structures, handling duplicate filenames, generating unique keys, and organizing uploads by user or category.
Security & Access
Proper authentication, secure URLs, file permissions, and preventing unauthorized access to uploads.
API Design
Building RESTful endpoints, handling multipart uploads, error responses, pagination, and proper JSON serialization.
What attach.fast provides
A REST API that handles the common file upload functionality
API Key Setup
Create an account, get an API key, and start uploading files. No AWS account or bucket configuration required.
Folder Management
Upload to nested paths like users/123/avatar and folders are created automatically with proper organization.
Multi-tenant Security
Files are isolated by site. Each API key can only access its own files, preventing data leaks between projects.
REST Endpoints
Upload, list, update, and delete files using standard HTTP methods. Works with any language or framework.
Start simple, migrate when ready
attach.fast is built on S3, so your data isn't locked in
1. Start with attach.fast
Use our API to add file uploads to your app without setting up AWS infrastructure.
2. Build your app
Focus on your application features while file storage is handled automatically.
3. Migrate later
When you're ready to manage your own S3 bucket, migration tools will transfer your files and folder structure.
Future migration will be simple:
attach-fast migrate --to-s3 \
--bucket=my-app-files \
--region=us-east-1attach.fast vs. Direct S3
| Feature | attach.fast | Direct S3 |
|---|---|---|
| Setup time | 2 minutes | 30+ minutes |
| Configuration | API key only | AWS credentials, bucket policies, CORS |
| Folder management | Automatic | Manual implementation |
| Multi-tenancy | Built-in | Custom implementation |
| API design | Ready to use | Build from scratch |
| File organization | Hierarchical, automatic | Flat keys, manual |
| Cost | Pay for usage | S3 costs + development time |
| Migration path | To your own S3 bucket | Already there |
Common use cases
When you need file uploads but don't want to manage infrastructure
Prototypes
Add file uploads to prototypes and MVPs without spending time on AWS setup and configuration.
Small Projects
Side projects and hackathons where you want file uploads but don't want to manage S3 buckets.
Client Applications
Freelance and agency work where you need reliable file handling without ongoing infrastructure management.
Early Stage Startups
Focus on product development while using a managed file service, then migrate to your own infrastructure when needed.
Get started
Create an account and start uploading files through our API
Free to start • S3-backed • Migration available