BoltDeckPhoto too big to email, or over the limit on an upload form? This free image compressor makes JPG, PNG, WebP and iPhone HEIC photos smaller in seconds. Choose a quality, or simply tell it a target like “under 1 MB” and it works out the rest for each image.
You can resize at the same time — by longest side, by percentage, or to fit inside a width and height — and compress a whole batch at once, then download everything as one ZIP. It all happens in your browser, so your photos never leave your device. No sign-up, no watermark, no limit.
How to use it
- 1Choose how small — pick a quality, or switch to "Target size" and choose a limit like 500 KB or 1 MB.
- 2If you also want smaller dimensions, choose a new size — for example longest side 1920 px — or leave the original size.
- 3Drop your images onto the box, or tap "Choose images". Each one is compressed straight away, and you can see how much smaller it got.
- 4Download them one by one, or all at once as a ZIP file. Change a setting and every image is made again.
🛡 Your files stay on your device
Everything happens right here in your browser. Nothing you type or upload is sent to a server, stored or seen by anyone — not even us.
How it works — and how to check it yourselfRead our privacy policy
Questions and answers
How much smaller will my photos get?
Usually a lot. A phone photo of 3–5 MB often comes down to 300–800 KB at 80% quality, and looks the same on screen. Resizing as well — say to 1920 px on the longest side — makes it smaller still.
What does "target size" do?
It finds the highest quality that still fits under your limit, separately for each image. If even a low quality is too big, it makes the image a little smaller until it fits. Handy for upload forms and email attachments with a size limit.
Are my images uploaded anywhere?
No. Compression happens in your own browser, on your phone or computer. Your images are never sent to BoltDeck or anyone else.
Why does my PNG hardly get smaller?
PNG is lossless, so there's no quality setting to lower — it only gets smaller when you resize it. For photos and screenshots, save as JPG or WebP instead and the file will usually be many times smaller.
Does compressing remove the photo's location?
Yes. The new file is made from the image's pixels only, so EXIF details such as GPS location, date and camera model are not copied over.
Will my image be stretched?
No. Resizing always keeps the shape of the image, and never makes an image bigger than the original.