How much will my images shrink?

30-70% reduction is typical. Heavily compressed sources see less; uncompressed exports see more. The bigger benefit is consistent file size across your library.

Will compression hurt visual quality?

Slightly, often imperceptibly. JPEG quality 75-85 is the sweet spot — visually indistinguishable from quality 100 but 30-50% smaller.

Should I use JPEG, PNG, or WebP?

JPEG for photos, PNG for graphics with transparency, WebP for modern compression (~30% smaller than JPEG at same quality).

Does this affect Core Web Vitals?

Yes. LCP is usually the hero image. Compressing it cuts LCP in half on most pages.

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?

WebP is supported in all browsers from 2020+. For 99% of modern audiences, WebP is safe.

Is there a file size limit?

20 MB. For very large images, resize 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?

Same job. This tool is faster for one-off compression and does not require Photoshop.

Will compressed images look good on retina?

Yes, if compressed at 2x display dimensions with quality 85.

Does compression hurt SEO?

No, the opposite. Smaller images = faster pages = better Core Web Vitals = better rankings.

Free Image Size Compressor

Compress JPEG, PNG, and WebP by 30-70% without visible quality loss. Free, no signup, no upload retention.

4.6on G2

4.7on Trustpilot

Used by 90,000+ developers

Click to upload image

JPG, PNG, WebP up to 10MB

What the Image Compressor does

Image weight is the #1 cause of slow pages. The compressor reduces JPEG, PNG, and WebP file sizes 30-70% without visible quality loss.

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 20 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 file.

When developers and marketers use it

Six common workflows.

Pre-publish optimization

Compress every image 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

Email banners often hit 100KB+ raw. Compress to under 50KB.

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

Webflow auto-compresses but conservatively.
Pre-compress before upload for aggressive savings.
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/Jekyll/Astro.
For external CDN images, pre-compress.
Spot-check with this tool.

Grigora vs. other compressors

Side-by-side feature comparison.

Capability	Grigora	TinyPNG	Squoosh	Free generators	Manual
Free + unlimited	Yes	Yes	Limited	Yes	Manual
JPEG/PNG/WebP	All three	Yes	Yes	Yes	Manual
Automatic compression	Yes	Yes	Yes	Mixed	Manual
No file retention	Yes	Stored	Stored	Mixed	Yes
Visual preview	Yes	Yes	Yes	No	Yes
No signup	Yes	Account required	Account required	Yes	Yes
Supports 20MB+ files	Yes	Limited	Yes	Limited	Yes
Result speed	<5 sec	<10 sec	<5 sec	<10 sec	Manual

Common errors and how to fix them

Eight issues teams hit when compressing images.

Compressed image looks blurry

Cause: Quality setting too low.

Fix: Re-compress at quality 80-85.

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: Source was already optimally compressed.

Fix: No action needed.

Transparency lost

Cause: Converted PNG with alpha to JPEG.

Fix: Use WebP or PNG to preserve transparency.

Tool fails on huge file

Cause: Image over 20MB.

Fix: Pre-resize before compression.

Animated GIF lost animation

Cause: GIF flattens to static.

Fix: Use a dedicated GIF optimizer.

Output filename is generic

Cause: Browser default download naming.

Fix: Rename on save.

Original data from our 2026 compression usage

Across 5,000 compressions through the tool.

47%

Average file size reduction across 5,000 compressions

0.8 sec

Median page-speed gain after compressing hero images

85 (52%)

Most common quality setting

JPEG (61%)

Most common input format

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