Free · No signup · Runs in your browser

Free Ad Image Compressor

Drop in images or a banner ZIP, set a weight target, and download optimized files in seconds. Built to hit ad-server limits like 150KB initial-load and 40KB backup JPGs — without wrecking how the creative looks.

Launch the compressor How it works
Your files never leave your browser — safe for unreleased campaigns.
Why use it

Built to hit ad weight limits.

Any weight target

Pick 150KB, 40KB or a custom KB limit, and every image is squeezed to at or under it.

Smart format pick

Auto-chooses the most efficient format — JPEG for opaque, WebP or PNG for transparency.

See before & after

Every image shows original vs optimized size and the percent saved, so you stay in control of quality.

Private & instant

Runs fully in your browser — nothing is uploaded — and downloads individually or as a ZIP.

How it works

Three steps, seconds, not minutes.

1

Add images or a ZIP

Drag in PNG, JPG, GIF or WebP files — or a banner .zip and we'll pull the images out. Nothing uploads to a server.

2

Set a weight target

Choose 150KB, 40KB or type a custom limit. We ramp quality down and only downscale if we have to.

3

Download optimized

Check the before/after on each image, then download them one at a time or as a single ZIP.

Why ours

Tuned for ad production, not just photos.

Quality-aware

It keeps quality as high as your target allows, and never ships a file bigger than the one you gave it.

Whole-banner ZIPs

Drop a banner .zip and it optimizes every image inside — handy for hitting the initial-load budget.

Real production knowledge

From a studio that builds 1,000+ trafficking-ready units a month for agencies.

Whole campaign to optimize?

We resize, optimize and ad-server-package at scale.

One master into every size, under weight, trafficking-ready and white-label — with a free first sample.

Banner resizing service
FAQ

Quick answers.

Is the ad image compressor free?
Yes — completely free, no signup, no watermark. It runs entirely in your browser, so there's nothing to install and you can compress as many images as you like.
Do my images get uploaded to a server?
No. All compression happens locally in your browser and your files never leave your machine — safe for unreleased campaigns and confidential creative.
Will it wreck the image quality?
It compresses intelligently: it ramps the quality down only as far as needed to hit your target, and only downscales dimensions as a last resort. You set the weight target, and every image shows its before and after so you can judge it. If it can't beat your original file, it keeps the original.
What file formats does it output?
It picks the most efficient format automatically — JPEG for opaque images (smallest), and WebP or PNG for images with transparency. You can drop in PNG, JPG, GIF or WebP.
Can it compress a whole banner ZIP at once?
Yes — drop in a .zip and it pulls out every image to optimize, then lets you download them individually or as a single ZIP. For high-volume optimization or full ad-server packaging done for you, see our banner resizing & production service.

Get your ads under weight — free.

No signup, no upload, no catch. Compress your banner images to spec in seconds, or hand the whole campaign to us.

Launch the compressor Get a free sample build