Are my images uploaded to a server?

No. Compression runs entirely in your browser using the Canvas API. Your images never leave your device — you can even go offline and it still works.

Which formats can I compress?

JPG, PNG, and WebP. Lossy formats (JPG and WebP) respond directly to the quality slider and shrink the most; PNG is re-encoded losslessly, so its savings come mainly from stripped metadata.

Why didn't my PNG get much smaller?

PNG is a lossless format, so quality compression doesn't apply to it. To shrink a photo-like PNG significantly, convert it to JPG or WebP first, then compress.

Does compressing reduce image quality?

For lossy formats, lower quality settings remove fine detail to save space. At 70–80% the loss is usually invisible; the tool lets you preview the size trade-off before downloading.

Is there a file size limit?

Files up to 25MB are supported, and there's no limit on how many images you compress. Everything is bounded only by your device's memory.

Can I resize an image too?

Yes — to change an image's pixel dimensions rather than its compression, use our image resizer.

Free Image Compressor

Compress JPG, PNG, and WebP images right in your browser. Drag the quality slider to shrink file size — no upload, no sign-up, your images never leave your device.

Drop your image here

jpg · png · webp · max 25mb · processed locally

How to Compress an Image in Your Browser

Drop in your image

Add a JPG, PNG, or WebP up to 25MB. The image loads straight into your browser — nothing is uploaded.

Drag the quality slider

Lower quality means a smaller file. The compressed size and how much you've saved update live as you adjust.

Download the smaller image

Save the compressed image with one click, in the same format you started with.

Everything You Need to Compress Images

A good compressor gives you control over the size-versus-quality trade-off and keeps your images private. Here's how this one does both.

Live quality control

A single slider lets you trade quality for size and see the resulting file size instantly, so you can stop the moment it's small enough.

JPG, PNG, and WebP

Compress the three most common web formats. Lossy formats like JPG and WebP shrink the most; PNG is re-encoded and stripped of bulky metadata.

No upload — 100% private

Compression runs on your device using the Canvas API. Your images are never sent to a server, so there's nothing to leak or retain.

Never larger than the original

If a setting would make the file bigger, the tool keeps your original bytes instead — so the download is always the smaller of the two.

When You Need to Compress an Image

Smaller images load faster, send easier, and fit within limits. These are the common reasons to compress.

Speed up a website

Oversized images are the top cause of slow pages. Compressing them cuts load time and improves Core Web Vitals without visible quality loss.

Fit an upload size limit

Forms, job portals, and email often cap attachments at a few megabytes. Compressing brings a large photo under the limit.

Send photos faster

On slow or metered connections, a compressed image uploads and shares in a fraction of the time.

Save storage space

Compressing a folder of images before archiving them reclaims a surprising amount of disk space.

Compress Images Without Uploading Them

Most online compressors upload your images to a server to process them. Since photos can be personal, doing it locally in your browser is the safer default.

In-browser with SupaTools

Your images are compressed on your device, never uploaded
Live quality slider with instant size feedback
JPG, PNG, and WebP supported
Free with no sign-up, no watermark, no file-count caps

Typical online compressors

Your images uploaded to an unknown server
Unclear how long files are stored or logged
Free tiers cap file count or size
Ads, sign-up walls, or watermarks on output

Pro Tips for Compressing Images

Aim for 70–80% quality

For most photos, 70–80% quality cuts the file size dramatically with no visible difference. Drop lower only when size matters more than fidelity.

Resize before you compress

If the image is far larger than it will be displayed, resizing its dimensions first saves even more than quality compression alone.

Use WebP for the smallest files

If your target supports WebP, it typically compresses smaller than JPG at the same visual quality.

Image Compressor — Frequently Asked Questions

Compress Your Images Free — No Upload

Drop in a JPG, PNG, or WebP and drag the slider to shrink it. Nothing is uploaded — it all runs in your browser.