Image Compressor
Add images and click Compress. See how much smaller each one gets.
Premium
PremiumDownload all as ZIP, Unlimited images. The same Premium also unlocks extra features in our other tools. Learn more
Install Kitbench as an app to open PDFs and images with right-click
Images are compressed in this page only. Nothing is uploaded.
How to use
- 1. Add imagesDrop them on the box or click to choose. Add as many as you like.
- 2. Choose format and qualityJPEG or WebP, the quality, and optionally a maximum long side.
- 3. Compress and downloadSee the before and after sizes, then download one by one or all at once.
JPEG or WebP?
| Format | Best for | Keep in mind |
|---|---|---|
| JPEG | Photos. Opens everywhere | No transparency (becomes white) |
| WebP | Images for websites. Usually smaller than JPEG at the same quality | Some older software can't open it |
Getting files even smaller
Reducing the long side often saves more than lowering quality, without visible loss. Phone photos are often over 4,000 pixels wide; for the web or email, 1920 or 1280 pixels is plenty.
FAQ
Who is this tool for?
It suits bloggers, web editors and online shop owners who want lighter photos so pages load faster, anyone blocked by an email or upload form size limit, people who want to shrink a batch of large phone photos, and anyone compressing confidential images (nothing is uploaded).
When is it most useful?
For example: before adding product photos to your shop, before putting several photos in a blog post, when an email with photos is too large to send, or when an upload form says the file is too big.
What do I gain from using it?
Lighter images make web pages load faster and make emailing and sharing quicker. You see the before and after sizes and the percentage saved right away, so it is easy to find the right quality. You can compress several images with the same settings at once.
Are my images uploaded?
No. Compression happens in your browser. The contents of your images are never sent anywhere.
What quality should I use?
For photos, around 70–80% usually looks the same while saving a lot of space. For images with text, 80% or higher keeps text sharp. You can choose from 10% to 100%; it starts at 80%.
What does “Max long side” do?
It sets the maximum length, in pixels, of the longer side of the image: 3840, 2560, 1920, 1280, 800 or 600. The proportions stay the same, and images that are already smaller are not enlarged. For the web or email, 1920 or 1280 usually makes files much smaller.
Can I keep PNG transparency?
This tool compresses to JPEG or WebP. Choose WebP to keep transparent areas; with JPEG, transparent areas become white.
What if the file doesn't get smaller?
Some images are already well optimized. If the format and size stay the same and the result would be larger, the original file is kept. When you change the format (for example PNG to JPEG), the result can sometimes be larger; lower the quality or the long side in that case.
How is the percentage saved calculated?
It is (1 − size after ÷ size before) × 100, rounded. With several images, the same is shown for the total before and after.
How many images can I add?
The free version takes up to 20 images at a time. With Premium you can add more than 20 at once. Very large images may take longer on slower devices.
How do I download the results?
Click “Download” next to each image, or “Download all” to save them one after another (some browsers ask whether to allow multiple downloads). Files keep their original names with a .jpg or .webp extension. With Premium you can download everything as one ZIP.
Is photo location data removed?
Compressed images don't keep it: each image is redrawn and saved, so details such as location and date taken are not included. If the original file is kept because it didn't get smaller, its original details remain.
Can I compress to a target size, like under 100 KB?
Not directly. Change the quality or the long side and click Compress again; the new size appears right away, so you can adjust until it fits your limit.
Does it work on phones?
Yes. Tap the box to pick photos or files. On narrow screens the image list and the settings are stacked in one column.
Premium
One Premium. Every upgrade, as much as you like.
- Download all as ZIP
- Unlimited images
- All paid features in every extension
- Premium features in Kitbench web tools
- Extensions we release later are included
- Monthly¥980/month
- Yearly¥9,800/year (about ¥817/month)
- Lifetime¥14,800 once
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