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image delivery for product teams

Every image your product serves, sized at the edge.

flashdn resizes, crops and converts your images on request, straight from your S3 bucket, and caches every result on Cloudflare's edge. One original, every size your pages need.

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https://img.yourshop.com/catalog/canyon.jpg?w=600&ar=1:1&fit=crop&auto=format

source 3000×2000
w=600
600px wide
ar=1:1
square frame
fit=crop
fill the frame, trim the rest
auto=format
AVIF or WebP when the browser takes it
600×600image/avifrendered once, then served from the edge

The URL parameters you already know

  • w
  • h
  • fit
  • crop
  • ar
  • dpr
  • q
  • fm
  • auto
  • fp-x
  • fp-y
  • blur
  • sharp
  • sat
  • rot
  • flip
  • bg
  • dl

How it works

Live in an afternoon

  1. 01

    Connect storage

    Point flashdn at your own S3 bucket through an IAM role, or upload to default storage we run for you.

  2. 02

    Add a domain

    Serve from img.yourdomain.com. Publish the DNS records the dashboard lists and the certificate is issued for you.

  3. 03

    Request any size

    Put the size, crop and format in the URL. The first request renders it; every one after comes from the edge.

What you get

Everything between the bucket and the browser

  • Resize and crop

    Fit, cover, pad or stretch. Smart crop on entropy or edges, or keep a focal point in frame.

  • AVIF and WebP

    auto=format picks the best format each browser accepts. auto=compress strips metadata.

  • Your bucket or ours

    Originals stay in your S3 bucket, read through a role you control. Or use managed storage.

  • Cached at the edge

    Renders are cached on Cloudflare. Purge a file or a whole source from the dashboard or the API.

  • Custom domains

    Your images on your hostname, with certificates issued and renewed automatically.

  • Upload widget

    Drop the flashdn uploader into your CMS so editors can upload and pick images in place.

  • Teams

    Invite your team as admins or members, with changes recorded in the activity log.

  • Usage you can see

    Bandwidth and requests per day, against your plan, on the overview page.

Moving from imgix

Change the host, keep your markup

flashdn reads imgix-style parameters, including the loosely formed ones that build up in real templates, so existing image URLs work as they are.

https://yourshop.imgix.net/hero.jpg?w=1200&auto=format

https://img.yourshop.com/hero.jpg?w=1200&auto=format

Start serving sharper, lighter images.

Monthly plans that grow with your traffic.

Get startedCompare plans