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Compress Photos and Images Online

Make JPG, PNG and WebP files smaller for email, websites and upload forms. Choose the quality, resize large photos or switch to WebP, and see exactly how much smaller each image gets.

How to compress photos and images

  1. 1

    Choose your images

    Pick up to 20 JPG, PNG or WebP images.

  2. 2

    Pick the quality and format

    80% quality suits most photos. Switch to WebP for the smallest files, make the images smaller in size, or set a file size to aim for.

  3. 3

    Compare and download

    Each image shows its size before and after. Check it with the Before and After buttons, then download one image or all of them in a ZIP.

How to reduce image file size

Photos from a phone are often 4000 pixels wide, far more than a screen, a website or an email ever shows. Choosing Up to 1920 px under Image size usually makes the image file much smaller on its own, without a visible difference in normal use.

Then choose the quality. Around 75 to 80% keeps photos looking the same to most people. Below about 60%, you may start to see blurry edges or blocky skies.

If a website or form has a size limit, like 50 KB for a photo or 20 KB for a signature, tick Aim for a file size and pick the limit. The tool finds the best quality that fits.

Compress photos online without losing more quality than necessary

Start with the largest change that does not affect how the image will be used: reduce oversized dimensions first, then lower quality gradually. A photo for email or a website usually needs far fewer pixels than the original phone camera file.

Use Before and After to check faces, small text, logos and fine edges. JPG is a practical choice for photographs, PNG is better for screenshots and transparent graphics, and WebP is often the smallest option when the receiving site accepts it.

JPG, PNG or WebP?

JPG is the everyday photo format and opens everywhere. PNG keeps every pixel exactly, which makes it right for screenshots, text and logos with see-through backgrounds, but wrong for photos, where it makes huge files.

WebP does both jobs well and is usually the smallest of the three. All modern browsers show it, so it's a great choice for websites. Some older programs and upload forms still only accept JPG, so check before you switch.

Compressing makes a new copy. Your original image isn't changed, and the copy leaves out hidden details such as the GPS location and camera model.

What happens to your files

PilotPDF does not keep copies of your original files, completed files, passwords, or document contents after processing.

Read our privacy policy for details about analytics and data handling.

Related tools

Resize Image

Set an exact width and height in pixels.

Crop Image

Cut away the parts you don't need first.

JPG to WebP

Convert photos to WebP without other changes.

Compress PDF

Make a PDF file smaller instead.

Frequently Asked Questions

Choose your images, pick a quality (80% is a good start), and click Compress. You can also reduce the image dimensions or choose a target file size. Each image shows its size before and after, and you can download them one by one or all together in a ZIP.
Yes. Choose your JPG, PNG or WebP photos, adjust the quality or size, and download the smaller copies without an account or watermark.
At 70 to 80% most photos look the same to the eye but are much smaller. Lower settings make smaller files but can show blurry or blocky patches. Use the Before and After buttons to check.
WebP files are usually much smaller than JPG or PNG at the same quality, and every modern browser can show them. If the image is going into an older program or a form that only accepts JPG, choose JPG instead.
Tick Aim for a file size and pick a limit: 20 KB, 50 KB, 100 KB, 200 KB, 500 KB or 1 MB, or type your own in MB. The tool lowers the quality until the image fits and, if it has to, makes it a little smaller in size too.
PNG doesn't throw any detail away, so photos saved as PNG stay big. Choose WebP or JPG for photos. Keep PNG for screenshots, logos and images with see-through backgrounds.
Sometimes, if the image was already well compressed. When that happens and you haven't asked for a new format or size, the tool keeps your original image quality, still removes the hidden details, and says it was already small.
Yes. Choose a size under Image size, such as 1920 px for Full HD or 1280 px for websites and email. The image keeps its shape and is never made bigger.
Yes. Saving the compressed copy drops hidden photo details such as the GPS location, camera model and date taken. Your original file isn't changed.
Up to 20 at a time. They're compressed one after another, so very large batches take longer on older phones.
No. PilotPDF doesn't keep your images or the compressed copies.