How much will my images shrink?

It depends on the source. Photos saved at high quality usually shrink the most. Files that are already compressed, and flat graphics, may shrink little or even grow. The result shows the exact before and after sizes.

Will compression hurt visual quality?

Some detail is lost, because every image is saved as a JPEG at quality 60. Fine texture and sharp edges show it first. If the downloaded file looks rough, keep your original.

Should I use JPEG, PNG, or WebP?

JPEG for photos, PNG for graphics that need transparency, WebP for small files that can keep transparency. This tool always saves a JPEG; for WebP, use the Image to WebP Converter.

Does this affect Core Web Vitals?

It can. When the Largest Contentful Paint element on a page is an image, a smaller file downloads sooner, which can lower LCP.

Is the original file changed?

No. The tool returns a compressed copy as a download; your source file is untouched.

Will WebP work in old browsers?

This tool saves a JPEG, which every browser opens. If you convert to WebP with the Image to WebP Converter, caniuse puts WebP support at over 96% of browsers in use.

Is there a file size limit?

10 MB. The page rejects larger files before uploading them, so resize big images first or use a desktop tool.

Can I batch-compress?

This tool handles one at a time. For batches, use a CLI like sharp-cli or imagemagick mogrify.

How does this differ from Photoshop's Save for Web?

Save for Web lets you choose the format, quality and size. This tool makes one fixed choice, a JPEG at quality 60, so it suits quick one-off jobs when you do not have Photoshop.

Will compressed images look good on retina?

The tool does not resize, so the JPEG keeps the pixel dimensions of the source. For sharp results on high-density screens, start from an image about twice the size it displays at.

Does compression hurt SEO?

No. Smaller images make pages load faster, which can help Core Web Vitals. Just keep each image sharp enough for its purpose.

Free Image Size Compressor

Click to upload image

JPG, PNG, WebP up to 10MB

Upload a JPEG, PNG or WebP up to 10 MB and get it back as a JPEG at quality 60, with the exact size saving shown. Free, no signup, no upload retention.

4.6on G2

4.7on Trustpilot

How to use the Image Size Compressor, step by step

Real screenshots of the tool, taken while running it with the Compress Image button.

1
Choose a file
Upload one JPG, PNG or WebP up to 10 MB. Nothing is kept on a server longer than the request needs.
2
Check the preview
The image loads locally with its name and size, so you can check it before compressing.
3
Compare the sizes
Compress Image returns a JPEG and shows the original size, the new size and the saving. This 98 KB photo came back at 24 KB.

What the Image Compressor does

Heavy images slow pages down. The compressor re-encodes a JPEG, PNG or WebP as a JPEG at quality 60. It keeps the pixel dimensions, removes metadata such as EXIF, and fills any transparent areas with white.

Upload an image, compress it, review the size savings, then download the optimized copy. Files are processed in-memory and discarded immediately.

How to compress an image

Four steps from upload to optimized download.

Upload your image

JPEG, PNG, or WebP. Up to 10 MB.

Click Compress

The tool processes the file and shows before/after sizes.

Review savings

Check the original size, compressed size, and total reduction.

Download

One-click download of the compressed JPEG.

When developers and marketers use it

Six common workflows.

Pre-publish optimization

Compress photos before CMS upload. Faster pages, better Core Web Vitals.

E-commerce product photos

Hundreds of product photos add up. Compress before upload.

Email attachment shrinking

Email size limits. Compress before attaching.

Newsletter banners

Compress banner photos before they go into a campaign so the email loads faster.

Mobile-first design

Mobile users on slow connections benefit most.

Page speed sprint

Compress oversized images dragging down PageSpeed scores.

Platform-specific setup guides

How to deploy compression on the platforms most teams use.

WordPress

Install ShortPixel, Smush, or Imagify for auto-compression.
Run files through this tool first for one-off cases.
Configure WebP delivery via your CDN.

Webflow

Compress large photos before you upload them to the Assets panel.
Keep images that need transparency as PNG or WebP, since this tool saves JPEG.
Verify with PageSpeed after publish.

Shopify

Shopify resizes via theme filters; compress source files first.
For editorial photos, compress aggressively.
Run periodic audits.

Next.js

Use next/image with WebP/AVIF format conversion.
For static images, compress before adding to /public/.
Pair with the rating tool to verify.

Static sites

Use built-in image processing in Hugo or Astro; Jekyll needs a plugin.
For external CDN images, pre-compress.
Spot-check with the rating tool.

Grigora vs. other compressors

Side-by-side feature comparison.

Capability	Grigora	TinyPNG	Squoosh	Free generators	Manual
Free + unlimited	Yes	Free: up to 20 images, 5 MB each	Yes	Yes	Manual
JPEG/PNG/WebP	All three in, JPEG out	Yes	Yes	Yes	Manual
Automatic compression	Yes	Yes	Yes	Mixed	Manual
Where files are processed	Our server, in memory, never saved	TinyPNG servers	In your browser, never uploaded	Mixed	Your computer
No signup	Yes	Yes	Yes	Yes	Yes
Largest file	10 MB	5 MB (free)	Not stated	Varies	Set by your software

Common errors and how to fix them

Eight issues teams hit when compressing images.

Compressed image looks blurry

Cause: The tool saves every image as a JPEG at a fixed quality of 60.

Fix: For detail-critical images, export from your editor at a higher quality instead.

PNG photo is huge

Cause: PNG is lossless: bad for photos.

Fix: Convert to JPEG or WebP for photo content.

Banding visible in gradients

Cause: JPEG artifacts on smooth gradients.

Fix: Use WebP or PNG for gradients.

File size increased

Cause: The source was already well compressed, or it is a flat graphic that JPEG handles poorly.

Fix: Keep your original file.

Transparency lost

Cause: JPEG has no transparency, so the tool fills transparent areas with white.

Fix: Keep the PNG, or use the Image to WebP Converter, which keeps transparency.

Tool fails on huge file

Cause: Image over 10 MB. The page rejects it before upload.

Fix: Pre-resize before compression.

Animated WebP lost animation

Cause: The tool keeps only the first frame and saves it as a JPEG.

Fix: Use a dedicated animation optimizer.

Output filename is generic

Cause: The tool names every download image_size_compressor_by_grigora.jpg.

Fix: Rename on save.

Frequently asked questions

Twelve answers about image compression.

Related free tools

Other utilities that pair with the Image Compressor.

Compress an image right now

Upload, compress, download. Free, unlimited, no retention.

Try the Compressor