How much can this actually reduce my file size?

For typical photos, expect 70-90% reduction at 70-75% JPEG or WebP quality. Graphics and icons with large flat color areas compress less dramatically since there's less redundant visual detail to discard. WebP generally saves another 25-30% over JPEG at equivalent visual quality.

Which output format should I pick?

Choose JPEG for the smallest possible files, best for photos shared by email or the web. Choose WebP for an excellent balance of quality and size on any modern platform. Choose PNG only when you specifically need lossless output or transparency — it will not shrink a photo nearly as much.

What image formats can I upload?

JPG, JPEG, PNG, WebP, GIF, BMP, AVIF, TIFF, and TIF are all accepted as input, regardless of which output format you choose.

Will the image dimensions or aspect ratio change?

No — compression only changes the encoding quality and format. Width and height stay exactly as they were in the source file. Use the separate Resize Image tool if you also need to change dimensions.

Can I compress a whole folder of images at once?

Yes — drop or select as many images as you need in one session. Every file is compressed independently and made available as individual downloads or one combined ZIP.

Does this touch or overwrite my original files?

No. Your original images are read but never modified. Compressed copies are generated separately and downloaded to your device, leaving the originals untouched.

Why isn't my PNG file getting much smaller?

PNG output is always lossless by design — it never discards visual information, so its size reduction comes only from more efficient repackaging, not from throwing away detail. Switch to JPEG or WebP output if a larger size reduction matters more than pixel-perfect fidelity.

What quality setting should I actually use?

65-75% suits most web and email use cases, giving strong file size reduction with no visible difference at normal viewing sizes. Use 85-95% for client-facing deliverables, print-adjacent work, or any image where fine detail needs to survive close inspection.

Does compressing an image strip its metadata, like camera EXIF data?

Yes — since each image is decoded to raw pixel data and re-encoded from scratch, metadata such as camera model, GPS location, and capture settings is not carried over to the compressed output.

Image Compressor — Compress JPG, PNG, WebP Up to 90% Free

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Conversion type

JPGPNG PNGJPG WebPJPG JPGWebP SVGPNG AnyCompressed ↓

Drop images here or browse

JPG · JPEG · PNG · WEBP · GIF · BMP · AVIF · TIFF · TIF · up to 35 at once

Output format

Quality

75%

Smaller fileBest quality

Your files never leave your device. All processing happens locally in your browser — nothing is uploaded to our servers.Files are never stored on our servers · No tracking of your file contentsPrivacy Policy

What is Image Compressor?

Image Compressor exists for a single, focused job that's distinct from format conversion: taking an image that's already in a perfectly fine format and making its file size dramatically smaller without a visible drop in quality. That distinction matters because compression and conversion often get conflated, but they're different operations solving different problems — the Image Converter tool on this site is for when you need a different file format; this tool is for when the format is already right but the file itself is too big for whatever you're trying to do with it: a website that's loading slowly because of oversized hero images, an email attachment bouncing against a provider's size cap, a photo gallery eating through cloud storage faster than it should.

The compression happening here works differently depending on which output format you choose, and understanding that difference is the key to getting good results instead of guessing at a slider. JPEG output uses lossy, discrete-cosine-transform compression — the same core approach JPEG has used since 1992 — which throws away visual information the human eye is comparatively bad at noticing (subtle color gradients, high-frequency texture detail) in exchange for large size reductions. WebP output uses a newer, more efficient prediction-based scheme that typically achieves 25-35% smaller files than JPEG at equivalent visual quality, because it predicts each block's pixel values from already-decoded neighboring blocks rather than compressing every block independently. PNG output, by contrast, is always lossless — it doesn't throw away any visual information, ever, regardless of what quality setting is shown — so choosing PNG here is really a choice to preserve exact pixel fidelity (and any transparency) at the cost of a much smaller size reduction than JPEG or WebP can achieve.

That's the trade-off at the center of this whole tool: quality and file size pull against each other, and the "right" setting depends entirely on what the image is for. A product photo destined for a fast-loading e-commerce page can usually drop to 65-75% JPEG quality with no visible difference to a typical shopper, saving 80% or more of the original file size. A photo being sent to a print shop for a large-format poster needs to stay much closer to 95-100% quality, where the file size savings are modest but the visual fidelity that print resolution demands stays intact. Compressing blindly at one fixed setting for every use case is how people end up either with visibly blocky images or with files that are still needlessly large — the slider exists because there genuinely isn't one correct number.

All of this compression work happens through the same browser-native mechanism used across this site's image tools: each source image is decoded to raw pixel data, drawn to an in-memory canvas, and re-encoded at your chosen format and quality using the browser's own image encoder. No image is ever transmitted to a server during that process, which matters for anything from unpublished product photography to personal photos you'd rather not route through a third party just to make the file smaller.

How It Works

Each source image is decoded by the browser's native image engine into raw, uncompressed pixel data and drawn onto an in-memory HTML canvas at full resolution — the dimensions never change during compression, only the encoding does. From that canvas, the image is re-encoded using canvas.toBlob() at your chosen output format and quality setting. For JPEG and WebP output, the quality percentage controls the degree of lossy compression applied: it adjusts the quantization level of the DCT-based encoder (JPEG) or the prediction and quantization parameters of the block-based encoder (WebP), trading fine visual detail for a smaller file as the percentage drops. PNG output ignores the quality setting entirely, since PNG's DEFLATE-based compression is always lossless — choosing PNG repackages the exact same pixel data more efficiently without discarding any of it. Every image in a batch is processed independently through this same pipeline, entirely client-side, with results bundled into a ZIP archive when more than one file is compressed at once.

How to Use

Upload images

Drop one or more images (JPG, PNG, WebP, GIF, BMP, AVIF, TIFF) onto the upload zone or click to browse your device.

Choose output format

Select JPEG for the smallest files, WebP for the best quality-to-size ratio, or PNG only when lossless output or transparency is required.

Set the quality level

Drag the slider based on what the image is for: 65-75% for web use, 85-95% for client-facing or print-adjacent work.

Compress

Click "Compress." Each image is decoded, drawn to canvas, and re-encoded in your browser using the native canvas engine — no uploads needed.

Compare the result

Check the before/after file sizes shown for each image. If a result still looks too large, lower the quality a bit further and re-run it.

Download

Download each compressed image individually, or get every file in the batch packaged into a single ZIP archive.

Who Uses This Tool

🌐

Website Performance

Compress hero images, banners, and product photos before uploading to your website to improve page load speed and Core Web Vitals scores.

📧

Email Attachment Limits

Reduce large photo attachments below a mail provider's size cap without a visible quality drop the recipient would notice.

📱

Social Media Uploads

Compress photos before posting so the platform's own re-compression has less to work with, reducing double-compression artifacts.

🛒

E-Commerce Listings

Compress product photos in bulk to speed up page loads on Shopify, WooCommerce, or Amazon listings where every extra second of load time costs conversions.

📂

Cloud Storage Savings

Shrink a phone's camera-roll backup or a shared photo archive to use meaningfully less cloud storage and sync faster on a slow connection.

🖨️

Presentations & Documents

Reduce embedded image sizes in slide decks and design files so the finished document isn't needlessly bloated by unoptimized photos.

Why Choose This Tool

Real Compression, Not Just Resizing

File size drops through re-encoding at your chosen quality level — the pixel dimensions stay exactly the same, so nothing looks smaller on screen.

Format-Aware Trade-offs

JPEG and WebP output apply genuine lossy compression for maximum savings; PNG output stays fully lossless for when exact pixel fidelity matters more than size.

100% Private — No Uploads

All compression runs locally in your browser using HTML Canvas. Your images are never transmitted to a server at any point.

A Slider, Not a Guess

The quality slider gives direct, immediate control over the size-versus-fidelity trade-off, rather than a fixed one-size-fits-all compression level.

True Batch Processing

Compress dozens of images in one pass and download every result bundled into a single ZIP archive instead of saving files one at a time.

Free — No Account Needed

No registration, no subscription, and no watermark added to the output. Compress as many images as needed at no cost.

Key Benefits

Supports JPG, PNG, WebP, GIF, BMP, AVIF, TIFF and more

Up to 90% file size reduction on photos

100% browser-based — your images never leave your device

Three output formats: JPEG, WebP, PNG

Batch compress multiple images at once with ZIP download

Adjustable quality slider for fine-grained control

Free up to 40 MB — sign up free for 80 MB, upgrade to Pro for 250 MB

Frequently Asked Questions

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iLoveDocsTools is used by students, professionals, and businesses across the United States, Canada, United Kingdom, Australia, India, and more than 100 other countries. All tools are browser-based and process files privately — your files never leave your device. Free to use, with Pro plans for unlimited access.

Image Compressor

What is Image Compressor?

How It Works

How to Use

Who Uses This Tool

Why Choose This Tool

Key Benefits

Frequently Asked Questions

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