Backblaze B2 Storage Support Now Available in LaunchFast…
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Backblaze B2 Storage Support Now Available in LaunchFast Starter Kits

LaunchFast works with Backblaze B2 out of the box. Same STORAGE_PROVIDER=s3, same pre-signed upload flow. Point AWS_ENDPOINT_URL_S3 at your regional B2 S3 endpoint and add your application key.

Rishi Raj Jain
Rishi Raj Jain Author
Backblaze B2 Storage Support Now Available in LaunchFast Starter Kits

LaunchFast now works with Backblaze B2 Cloud Storage, and we didn’t ship a single line of starter kit code to make it happen.

Backblaze B2 is affordable, S3-compatible object storage built for developers who want predictable pricing without AWS complexity. Swap the endpoint, keep your code. Same repo. Same STORAGE_PROVIDER=s3. Point AWS_ENDPOINT_URL_S3 at your regional B2 S3 endpoint, add your application key credentials, and you’re uploading files through the same pre-signed URL flow LaunchFast already uses for Amazon S3, Cloudflare R2, Tigris, Neon Storage, and Bunny Storage.

One stack. One endpoint. Ship faster.

Why this matters

LaunchFast treats object storage as S3-compatible by default. B2 speaks the S3 API, so avatars, uploads, and generated assets just work. No adapter, no fork, no waiting on a release.

  • No code changes: The kit already supports custom S3 endpoints. Backblaze B2 is already supported.
  • Predictable pricing: Pay for storage at a fraction of typical cloud object storage rates, with straightforward billing.
  • S3-compatible API: Use the same AWS_KEY_ID, AWS_SECRET_ACCESS_KEY, and bucket env vars you already know. B2 application keys map directly to S3 credentials.
  • Proven at scale: Backblaze has stored exabytes of data for over a decade. B2 is built for durability, not demo-tier uptime.

What’s included

  • S3-compatible uploads and retrieval via LaunchFast’s existing /api/storage routes and <Upload /> component
  • Pre-signed URLs for secure client-side uploads, identical flow to other S3 providers
  • One env var: AWS_ENDPOINT_URL_S3 points the S3 client at your B2 regional endpoint (e.g. https://s3.us-west-004.backblazeb2.com)
  • Available in all frameworks: Astro, Next.js, and SvelteKit starter kits

Under the hood, LaunchFast’s S3 helper already routes requests through a custom endpoint when AWS_ENDPOINT_URL_S3 is set. Backblaze B2 plugs into that same path.

Getting started

1. Create a B2 bucket and application key

Sign up at backblaze.com and create a bucket in the B2 Cloud Storage dashboard.

Then go to App Keys and create a new application key with read and write access. Copy:

  • keyID (your access key ID)
  • applicationKey (your secret access key, shown once)
  • S3 Endpoint (regional, e.g. https://s3.us-west-004.backblazeb2.com)
  • Bucket name
  • Region (e.g. us-west-004)

See Backblaze’s S3-compatible API docs for the full walkthrough.

2. Configure your .env

Set STORAGE_PROVIDER to s3, then add your B2 credentials:

Terminal window
STORAGE_PROVIDER="s3"


AWS_ENDPOINT_URL_S3="https://s3.us-west-004.backblazeb2.com"
AWS_KEY_ID="your-key-id"
AWS_SECRET_ACCESS_KEY="your-application-key"
AWS_S3_BUCKET_NAME="your-bucket-name"
AWS_REGION_NAME="us-west-004"

Do not set CLOUDFLARE_R2_ACCOUNT_ID when using Backblaze B2. That variable is only for Cloudflare R2.

Replace the endpoint and region with the values shown for your bucket in the B2 dashboard. Endpoint format is https://s3.<region>.backblazeb2.com.

3. Run the app and upload a file

Start your dev server, sign in, and upload a profile image or any file through the built-in upload flow. LaunchFast generates a pre-signed PUT URL against your B2 bucket, the browser uploads directly, and retrieval works through the same signed-URL path.

For framework-specific setup notes, see the Storage section in the starter kit README:

Other storage providers

Backblaze B2 joins the storage providers LaunchFast already supports:

Switch providers anytime by updating STORAGE_PROVIDER and the relevant env vars. No application code changes required.

Get started today

Want affordable object storage with an S3 API you already know and no new upload flow to wire?

Get LaunchFast Starter Kit and point it at Backblaze B2 in minutes.

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