Image Compressor

Compress JPG, PNG, and WebP up to 80% with a quality slider. Batch up to 250 images. Runs in your browser. No uploads, no signups, no ads.

Free to use. Runs in your browser.

Select a JPG, PNG, or WebP and drag the quality slider to reduce file size. Results vary by image content, format, and resize settings.

Quick Presets

Optimized for websites

Quality

75%

Starting point: 70-85% for many web images

Output Format

Resize (Optional)

Max Width (px)

Max Height (px)

Leave at 0 to keep original dimensions

Drag & drop images

or click to browse (up to 250 more)

Batch Processing

Up to 250 selected images

Browser-Based

Compresses after page load

ZIP Download

Download all at once

How Image Compression Works

Image compression reduces file size by encoding pixel data more efficiently. Think of it like summarising a book, you keep the important plot points but cut the filler. A camera captures far more colour detail than your eyes can distinguish, so compression removes that invisible excess.

Lossy compression (used for JPEG and WebP) discards data your eyes are unlikely to notice, subtle colour variations, high-frequency noise, and imperceptible gradients. The result looks identical to most viewers but can be 50-90% smaller. Lossless compression (PNG) reorganises data without removing anything, the file is smaller but every pixel stays identical to the original.

The quality slider controls how aggressively data is discarded. At 90-100%, you'll barely notice any change. At 60-70%, file sizes drop dramatically with minor quality loss visible only when zoomed in at 200%. Below 50%, compression artifacts become visible, blocky patches in gradients and soft halos around text. That's useful for thumbnails where file size matters more than detail.

After this page has loaded, this tool uses the browser Canvas API to compress selected images. It does not upload selected images to an iForge Apps server. You can process up to 250 selected images in one batch.

Lossy vs Lossless, Which Do You Need?

Lossy Compression

Permanently removes data. Like resizing a photo smaller, you can't get the lost pixels back. But the file size reduction is dramatic: 70-90% smaller with barely noticeable quality loss.

Formats: JPEG, WebP (lossy mode), AVIF (lossy mode)

Works well for: Photos, website images, social media, email attachments

Don't re-compress already-compressed images repeatedly. Each pass degrades quality further, like photocopying a photocopy.

Lossless Compression

Reorganises data more efficiently without losing anything. Like zipping a file, the uncompressed result is bit-for-bit identical to the original. Savings are modest: typically 10-30%.

Formats: PNG, WebP (lossless mode), AVIF (lossless mode)

Works well for: Screenshots, logos, icons, technical diagrams, images you'll edit later

Safe to re-compress as many times as needed. No quality degradation ever.

What this means for you: If you're putting photos on a website, social media, or email, use lossy compression at 75-85% quality. If you're working with screenshots, logos, or images you'll edit further, use lossless PNG or keep the quality slider above 90%.

Format Comparison

Format	Compression	Transparency	Browser Support	Works Well For
JPEG	Lossy	No	Universal (100%)	Photos, complex images with gradients
PNG	Lossless	Yes (alpha)	Universal (100%)	Logos, screenshots, icons, text overlays
WebP	Both	Yes (alpha)	Broad modern-browser support	Photos and web images where WebP is accepted
AVIF	Both	Yes (alpha)	~93% browsers	Next-gen web (50% smaller than JPEG)
GIF	Lossless (256 colours)	Binary only	Universal (100%)	Simple animations, avoid for static images
SVG	Vector (lossless)	Yes	Universal (100%)	Icons, logos, illustrations, not photos

What this means for you: For web use, WebP is a good default when your destination accepts it. AVIF can be smaller but encode times are slower and support varies. Use JPEG when you need broad compatibility with email clients or older systems.

Quality Guidelines by Use Case

Web (75-80%)

A practical starting range for website images. It can reduce file size while keeping visible quality acceptable for many photos.

Email (65-75%)

Email attachments have size limits (Gmail: 25 MB total, Outlook: 20 MB). Lower quality keeps images under typical thresholds while remaining clear on screen. Total email size under 1 MB loads fastest.

Social Media (80-85%)

Platforms re-compress your uploads, so starting with moderate compression avoids double-compression artifacts. Upload at 80-85% quality, the platform does the rest.

Print (90-100%)

Keep quality high for anything that will be printed. Compression artifacts invisible on screen can appear in 300 DPI print output. Use 90%+ or lossless for glossy materials.

Platform Image Requirements

Platform image rules change over time. Search for your platform to find planning settings, then verify current requirements before important uploads or paid campaigns.

Platform	Limit Note	Dimensions	Quality	Notes
Instagram Feed	Check platform	1080×1350 px	80-85%	Common 4:5 portrait planning size. Platform compression can change output
Instagram Stories	Check platform	1080×1920 px	80-85%	Common 9:16 vertical planning size. Keep text away from UI areas
Facebook Post	Check platform	1200×630 px	80%	Common link-preview style size. PNG can suit text-heavy graphics
Facebook Cover	Check platform	820×312 px	85%	Displays differently on mobile, keep key content centred
Twitter/X Post	Check platform	1600×900 px	80%	Common 16:9 planning size. Check current platform guidance
LinkedIn Post	Check platform	1200×627 px	80%	Common 1.91:1 planning ratio for shared posts
TikTok Cover	Check platform	1080×1920 px	80%	Vertical cover planning size. Profile grids may crop to centre square
Pinterest Pin	Check platform	1000×1500 px	80%	Common 2:3 pin planning ratio
YouTube Thumbnail	Check platform	1280×720 px	85%	Bold text and high contrast are easier to read at small sizes
Shopify Product	Check Shopify	2048×2048 px	85%	Square product image planning size. Check Shopify guidance before upload
Amazon Product	Check marketplace	2000×2000 px	90%	Common marketplace product format. Check listing rules before upload
eBay Listing	Check marketplace	1600×1600 px	85%	Marketplace rules can change. Check the listing guidance
Etsy Product	Check marketplace	2000×2000 px	85%	Search and listing crops can differ. Check the current seller guide
WooCommerce	Configurable	800×800 px+	80%	Default thumbnail 300×300. Upload at 800+ and let WordPress resize
WordPress Post	Configurable	1200×628 px	80%	Featured image appears in social shares. Keep under 200 KB for speed
Squarespace	Check CMS	1500 to 2500 px wide	80%	CMS image rules can change. Check the current help page
Wix	Check CMS	1920 px wide	80%	Wix can optimise images, but starting compressed can help page speed
Webflow	Check CMS	Varies	80%	Check the current asset guidance before upload
Google Ads	Check Google	Various	85%	Ad asset rules change. Check Google Ads guidance before publishing
Email (general)	Keep small	600 to 800 px wide	70-75%	Smaller email images load more reliably across clients
Mailchimp	Check provider	600 px wide	75%	Check the current provider plan and storage guidance
Google My Business	Check Google	720×720 px	85%	Common business profile image size. Check Google Business Profile before upload
Apple App Store	Check Apple	1290×2796 px (6.7")	95%	Common screenshot planning size. Check App Store Connect before submission
Google Play Store	Check Google	1080×1920 px+	90%	Check Play Console guidance before submission

Showing 24 of 24 platforms. Treat limits as planning notes and verify current rules on the destination platform.

Compression Settings by Scenario

Different situations call for different compression strategies. A blog header image and a WhatsApp photo need completely different treatment. Search for your use case to get specific recommendations.

Scenario	Target Size	Quality	Format	Tip
Blog hero image	100-200 KB	75-80%	WebP (JPEG fallback)	Biggest single improvement for page speed. Compress aggressively
Product photo (web)	80-150 KB	80-85%	WebP	White background photos compress extremely well. 80% is plenty
Background/hero image	150-300 KB	70-75%	WebP	Large images benefit most from WebP. Test AVIF for even smaller files
Thumbnail / card image	20-50 KB	70-75%	WebP or JPEG	Small images are forgiving, compress heavily, viewers won't notice
Email newsletter header	50-100 KB	70-75%	JPEG	WebP not supported in most email clients. Stick with JPEG
Email product image	30-60 KB	70%	JPEG	Multiple images add up fast. Keep each under 60 KB
Instagram post	Under 1 MB	82-85%	JPEG	Don't over-compress, Instagram re-compresses. Start clean
Facebook ad creative	Under 150 KB	80%	PNG for graphics, JPEG for photos	Under 20% text rule removed, but less text still performs better
Portfolio / photography	300-500 KB	85-90%	JPEG	Quality matters here. Go higher than other use cases
Resume / CV photo	50-100 KB	85%	JPEG	Small dimensions = small file. One compress pass is enough
Real estate listing	100-200 KB	80%	JPEG or WebP	Listings with faster-loading photos get more clicks
WhatsApp / Telegram share	Under 1 MB	75-80%	JPEG	Apps re-compress anyway. Get it under 1 MB and don't worry
PDF embedding	50-150 KB per image	75-80%	JPEG	Images are the #1 reason PDFs are huge. Compress before embedding
Presentation slides	100-200 KB each	80%	JPEG for photos, PNG for charts	A 50-slide deck with uncompressed images can hit 200 MB. Compress first
Print (flyer / brochure)	1-5 MB	90-95%	JPEG or TIFF	Print needs higher quality. Don't compress below 90% for glossy prints

Showing 15 of 15 scenarios.

Real-World Compression Results

These are typical results at 75% quality using JPEG output. Your results will vary depending on image content, photos with large areas of similar colour compress better than busy, detailed scenes.

Image Type	Original	75% Quality	Savings	Why
Smartphone photo (12MP)	4.5 MB	800 KB	82%	Phones over-save to preserve editing headroom
DSLR photo (24MP)	12 MB	2 MB	83%	RAW→JPEG conversion alone saves 80%+
Website hero image	1.5 MB	250 KB	83%	Often exported from design tools at max quality
Product photo (studio)	3 MB	400 KB	87%	White backgrounds compress extremely well
Screenshot (PNG → JPEG)	2 MB	200 KB	90%	Solid colours and text compress heavily
Scanned document	5 MB	500 KB	90%	Scanners save at 600 DPI, 150 DPI is fine for screen
Infographic / chart	800 KB	300 KB	63%	Sharp edges and text resist lossy compression

Key insight: The biggest gains come from images that were over-saved in the first place, smartphone photos, design exports, and scanned documents. Images that are already compressed (web downloads, social media screenshots) have less room for further reduction.

Worked Example: Speeding Up an Online Store

The situation: Tom runs a Shopify store selling handmade candles. His product pages load in 6.2 seconds on mobile, Google recommends under 2.5 seconds. His Lighthouse Performance score is 38/100 and the top recommendation is "Properly size images."

Step 1: Audit

Tom has 45 products with 4 images each, 180 images total. His photographer exports at maximum quality (5-8 MB each). Total image weight: roughly 1.2 GB across the store. Each product page loads 4 images averaging 6 MB = 24 MB per page visit.

Step 2: Compress

He drags all 180 images into the compressor. Settings: 80% quality, WebP output (Shopify supports WebP), max width 2048px. The batch processes in about 2 minutes. Average file size drops from 6.5 MB to 180 KB, a 97% reduction.

Step 3: Re-upload

He re-uploads the compressed images to Shopify, replacing the originals. Shopify generates responsive sizes automatically from his 2048px uploads. Each product page now loads ~720 KB of images instead of 24 MB.

Result

Page load time dropped from 6.2s to 1.8s on mobile. Lighthouse score went from 38 to 89. Bounce rate dropped 23% in the first week. His images look identical to the originals, the quality difference is imperceptible at screen resolution. Total storage dropped from 1.2 GB to 32 MB.

Why Page Speed Matters (The Numbers)

Images are typically 50-70% of a web page's total weight. Compressing them is the single highest-impact thing you can do for page speed. Here's what the research shows:

Load Time	Bounce Rate Impact	Source
1s → 3s	+32% bounce rate	Google / Think with Google
1s → 5s	+90% bounce rate	Google / Think with Google
1s → 10s	+123% bounce rate	Google / Think with Google
0.1s faster	+8% conversion rate (retail)	Deloitte / Google

Google also uses page speed as a ranking factor. Faster pages rank higher in search, especially on mobile. If you do nothing else for your website's SEO, compress your images.

Metadata & Privacy

Every photo from your phone or camera contains EXIF metadata, hidden data embedded in the file. This includes GPS coordinates (where the photo was taken), device model, date and time, camera settings, and sometimes your name. Compression strips most of this automatically when converting to a new format.

What gets stripped

GPS location, camera model, lens info, date/time, software used, copyright text, thumbnail preview, colour profile (when converting formats)

What survives

The pixel data itself. Anything visible in the image (faces, documents, screens, reflections) remains, metadata stripping doesn't redact visual content

If you specifically need to remove metadata without compressing, use our Metadata Remover tool. If you're compressing anyway, the compression process handles it.

Common Mistakes

Compressing already-compressed images

Re-compressing a JPEG that was already saved at 75% quality makes it worse, not better. Each lossy pass degrades quality. If the image came from the web or social media, it's already been compressed. Start from the original source whenever possible.

Using PNG for photographs

PNG is lossless, it preserves every pixel perfectly. That's great for screenshots but terrible for photos. A 12MP photo as PNG can be 15-20 MB. The same photo as JPEG at 80% is 800 KB and looks identical. Use JPEG or WebP for photos.

Not resizing before compressing

Compressing a 4000×3000 pixel photo to display at 800px wide wastes bandwidth. Resize to the display size first, then compress. A 4000px photo at 80% quality is still larger than an 800px photo at 90% quality.

Using JPEG for text and logos

JPEG compression creates visible artifacts around sharp edges and text. Screenshots, logos, and text-heavy graphics should use PNG (lossless) or WebP (lossless mode). If you must use JPEG, keep quality above 90%.

Over-compressing for print

What looks fine on screen at 72 DPI can look terrible when printed at 300 DPI. If images are going to be printed on glossy paper or large format, keep quality at 90% or above. The file size penalty is worth it.

Forgetting to test

Compression results vary by image content. A sunset photo looks fine at 60% quality, but a product photo with fine text on the label might need 85%. Always open the compressed version at full size before using it.

Related Tools

Image Resizer

Resize to exact pixel dimensions before compressing

Image to WebP

Convert directly to WebP for smallest web files

Image to PNG

Convert to lossless PNG for screenshots and logos

Metadata Remover

Strip EXIF data for privacy without changing quality

Compress PDF

Reduce PDF file sizes (often image-heavy)

AVIF Converter

Convert to next-gen AVIF for even smaller files

How to use this tool

Select images, drag and drop or choose up to 250 at once

Choose a preset or adjust quality and format settings

Download compressed images individually or as a ZIP

Common uses

Reducing image file sizes before uploading to a website or CMS
Compressing photos for email attachments that stay under size limits
Batch-optimising product images for faster e-commerce page loads
Preparing images for social media posts without losing visible quality
Shrinking screenshot files for documentation or support tickets

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Frequently Asked Questions

How does image compression work?

Image compression reduces file size by removing unnecessary data and optimising encoding. Our tool uses lossy compression that maintains visual quality while significantly reducing file size.

Which quality setting should I use?

For most images, 70-80% quality provides an excellent balance between file size and visual quality. For photos with fine details, try 85-90%. For web thumbnails, 60-70% works well.

Which output format should I choose?

WebP usually gives strong compression for web use. JPEG is widely compatible. PNG preserves transparency but has larger files. Use 'Original' to keep your current format.

Are my images uploaded anywhere?

After this page has loaded, selected images are compressed in your browser using the Canvas API and are not uploaded to an iForge Apps server by this tool.

What's the maximum file size?

Each image can be up to 20MB, and this page accepts up to 250 selected images in one batch.

Will compression make my images look blurry?

At 70-85% quality, most people can't tell the difference. Below 50%, compression artifacts become visible, blocky patches and colour banding, especially in gradients and smooth areas.

What's the difference between lossy and lossless compression?

Lossy (JPEG, WebP) discards data permanently for much smaller files. Lossless (PNG) keeps every pixel perfect but files are larger. For web use, lossy compression at 75-80% is the standard recommendation.

Can I compress PNG files?

Yes, but PNG uses lossless compression so the savings are smaller than JPEG or WebP. For maximum compression, convert PNG photos to WebP or JPEG, unless you need transparency.

How much can I reduce file size?

Typically 50-80% for photos. A 2 MB JPEG at 75% quality often compresses to 400-600 KB with no visible difference. Results vary based on image content, detailed photos compress less than simple graphics.

Does the resize option affect quality?

Downsizing images (reducing pixel dimensions) actually improves perceived quality because you have fewer pixels to compress. A 4000px-wide photo resized to 1920px and compressed to 75% looks sharp and loads fast.

What quality does Google recommend for web images?

A 75-85% quality range is a common starting point for web images. It usually gives a practical balance between file size, visual quality, and page speed.

Can I undo compression?

No. Lossy compression permanently discards data. Always keep your original files and compress copies. This tool doesn't modify your source files, it creates new compressed versions.

Results are for general informational purposes only and should be checked before use. They are not professional advice. See our Disclaimer and Terms of Service.