Free · No signup · Runs in your browser

Free HTML5 Backup JPG Generator

Turn your HTML5 banner ZIPs into CM360-compliant backup images — auto-sized, first-frame-rendered and optimised to under 40KB. Drop in a whole set and download them individually or as a ZIP.

Launch the generator How it works
Your files never leave your browser — safe for unreleased campaigns.
Why you need it

No backup image? The placement won't serve.

Every HTML5 unit needs a compliant fallback image, or ad servers reject it. Doing that by hand across a whole size set is exactly the tedious job this tool removes.

Auto-sized per banner

Detects each unit's dimensions and renders the first frame at the correct size automatically.

Under 40KB

Optimises JPG compression to meet CM360's weight limit, with a clear compression summary.

Whole sets at once

Drop in multiple ZIPs and get every backup — download individually or all together as a ZIP.

How it works

Drop in ZIPs, get backups.

1

Upload your ZIPs

Add one or more HTML5 banner ZIPs. Everything is processed locally in your browser.

2

First frame rendered

The tool detects each size, captures the first frame and compresses it under the weight limit.

3

Download

Grab each backup JPG individually or download the whole set as a single ZIP.

Why use it

From a studio that ships backups daily.

Private by design

Rendering and compression happen in-browser — your creative never leaves your machine.

Set, not single

Built for real production volume — batch a full campaign's units in one pass.

Spec-correct

Output sized and weighted the way CM360 expects, by people who traffic ads every day.

Want the whole set built?

We deliver HTML5 banners with backups as standard.

Hand off the production entirely — trafficking-ready units, backups included, white-label, with a free first sample.

DV360 banner production
FAQ

Quick answers.

What is a backup image / backup JPG?
It's the static fallback an ad server shows when the HTML5 version can't run. Campaign Manager 360 requires every HTML5 unit to ship with a correctly-sized, weight-compliant backup image — usually under 40KB.
Is this tool free?
Yes — free with no signup. Upload one or more HTML5 banner ZIPs and it generates a CM360-compliant backup JPG for each.
Do my files upload anywhere?
No. It renders the first frame and compresses the JPG entirely in your browser — your creative never leaves your machine.
How does it keep the file under 40KB?
It captures the banner's first frame at the correct dimensions and optimises the JPG compression to meet CM360's weight limit, showing you a compression summary for each unit.
Can you produce the whole banner set, backups included?
Yes — we build trafficking-ready HTML5 banners with backups handled as standard. See DV360 banner production or send a brief for a free sample.

Generate your backups now — free.

No signup, no upload, no catch. Turn your HTML5 ZIPs into CM360-compliant backup images, or hand the whole build to us.

Launch the generator Get a free sample build