The best free bulk image compressor Why best?

Smaller images.
Faster pages.

Drop up to 20 images. Get them back smaller and sized for where they're going, in seconds.

85% smaller on average, across 15,000+ images compressed by the Pacing team

Compress images free Or get a free page speed review

Your images never leave your device. Nothing is uploaded, so we never see or store them.

Free · No sign-up · No watermark

Drag the split. Real images from client websites.

Same images. A fraction of the size.

Real files from Pacing client websites. Open any one for the full breakdown.

Single images Made with the free tool

A whole homepage On a slow mobile connection

Example homepage

10 images, uploaded the way most sites do it.

Real files from Pacing client websites, put together as one typical homepage: a big banner, lifestyle photos, a screenshot saved as PNG, renders and portraits.

Before
6.6 MB
After
355 KB
Smaller
95%
Before34 s
After1.8 s

Image download time on Lighthouse's slow mobile connection. Played about 5× faster.
02 How it works

Drag. Drop. Download. Seconds, not settings.

  1. 01

    Drop your images

    Up to 20 at once, 10 MB each. Or paste a screenshot. They stay on your device.

  2. 02

    Say where they're going

    Pick hero, product shot, email or ad. Each image is sized and fitted to a sensible budget.

  3. 03

    Check, then download

    Drag the split to compare with the original. Then take one zip with every file.

03 Features

Everything a fast page needs. Nothing it doesn't.

Destination presets

Say where the image is going. We set the width, format and file size for you.

Target file size

Name a limit and each file is squeezed to fit, at the best quality that does.

Before and after

Drag the split on every image. Ship it only when you can't tell the difference.

Savings report

See how much smaller your files got and the time it saves on mobile. Share it with your team.

Responsive sizes

Export 480, 960 and 1440 px copies with the srcset markup ready to paste.

Works on any device

Phone, tablet or computer. Open the page and go. Nothing to install.

Private by design. Your images stay with you.

  • No upload. The compressing happens on your own phone or computer, inside this web page.
  • We never see your files. They are not sent to us, so there is nothing for us to store, share or lose.
  • Hidden details removed. Camera and location data are stripped from every file you download.

Safe for unreleased campaigns, client work and photos of people.

Not sure which format to pick? Read the plain-English format guide. Want this tool on your own website? Ask us.

04Size budgets

How big is too big?Here’s our size limit for each image.

Images are often the heaviest thing on a page. A slow hero loses paid visitors before it appears and drags on your Core Web Vitals.

Pacing rule of thumb

The file sizes we target for different client placements. Each one is a preset in the tool, one click away.

WhereWhy it mattersFormatAim for
Website hero or ad landing page The first thing a paid visitor waits for. WebP < 200 KB Open preset Product shots Grids of photos add up fast on mobile data. WebP < 100 KB Open preset Blog images Image-heavy articles stay quick to load and to crawl. WebP < 150 KB Open preset Social ads Clean JPEGs at 1080 px, the size ad platforms ask for. JPEG < 300 KB Open preset Email JPEG, because some email apps still can't show WebP. Sharp on retina screens. JPEG < 150 KB Open preset Logos and icons Clean edges and transparency. No fuzzy logos. PNG < 30 KB Open preset
05 Pacing Agency

Fast images are step one. We can help with the rest.

Pacing is the marketing team behind this tool. We build websites, run paid campaigns and set up tracking, and page speed runs through all three.

Websites

Fast, clear sites that turn visits into enquiries and sales.

Paid media

Google and Meta campaigns, with landing pages that load before the click goes cold.

Tracking

Analytics you can trust, so you know which pages and ads actually pay.

Free page speed review

Send us a page. We'll show you what's slowing it down.

Images, scripts and load order, checked by our team. You get the fixes in order of impact, whether or not you work with us.

Get my free review Takes a minute to ask. No obligation.
Why we say “best”See how we compare with TinyPNG, Squoosh and five other free tools

In September 2026 we compared the free online compressors people use most: TinyPNG, Squoosh, Compressor.io, iLoveIMG, ShortPixel, Optimizilla and Kraken. Pacing Compressor is the only one that does all of this at once:

  • Compresses a batch of up to 20 images, 10 MB each
  • Never uploads them: the work happens in your browser
  • Outputs WebP, AVIF, PNG or JPEG
  • Shows a before and after on every image, with the saving
  • Removes camera and location data from what you download
  • No account, no watermark, no daily credits

Squoosh is private too but converts one image at a time. The others upload your files to their servers. Smallest file is not the only test: at the same visual quality, encoders win on some formats and lose on others, so compare before you download.

06 Questions

Good questions.

Is it really free?

Yes. No account, no watermark, no daily credits. We built it for our own client work and opened it up.

Are my images uploaded?

No. Everything happens on your own phone, tablet or computer, right inside this web page. Your images are never sent to us, so we can't see or keep them. Camera and location details are removed from every file you download.

Does it work on my phone?

Yes. Open the page on any modern phone or tablet, pick photos from your library and download the smaller copies. Nothing to install.

Which format should I pick?

WebP for almost everything on the web. PNG for logos that need transparency. AVIF for the smallest files on image-heavy pages. JPEG for email and ad platforms. Read the format guide.

Will my images look worse?

Not to the eye, on the default settings. Every image gets a before and after slider, so you can check each one before you download.

Why does AVIF take longer?

AVIF squeezes harder, so each file takes more work. Pick Faster under Speed, or use WebP when you're in a hurry.

Can I add this tool to my own website?

Yes, on request. We can switch on a version that sits inside a page on your site, with the same privacy. Tell us your website address and we'll set it up.

Can I do bigger batches?

The free tool takes 20 images, 10 MB each. For bigger jobs or a command-line version, talk to us.

07 Get started

Faster pages start here. Drop your first batch.

Free, private and done in seconds. When you want the whole site this fast, we're here.

Compress images free Free speed review

Built by Pacing Agency, your marketing team for performance marketing, websites and tracking.