Add up to 12 images
Choose or drop JPG, PNG, or WebP files. The image compressor keeps them in this browser tab.
One image or a batch of twelve
Image Compressor
Compress images online with one consistent quality, resolution, and format recipe. This image compressor processes up to 12 JPG, PNG, or WebP files locally and shows the result before download.
Up to 12 imagesNo uploadNo watermarkDownload all
Drop images here
JPG, PNG, or WebP · Up to 12 files
Original—
Result—
Saved—
Measured output
Three ways the image compressor reduces bytes
These files use the same 1200 × 800 source. JPG and WebP use quality 78 at full resolution; the third result also scales the source to 720 × 480. The sizes are the actual generated assets, not estimated marketing claims.
Batch workflow
How to compress images online
The image compressor uses one visible recipe for the batch. That makes product photos, article images, or email attachments consistent instead of making you repeat the same choice file by file.
Apply one clear recipe
Set compression quality, resolution scale, and output format once for the complete batch.
Check and download
Review original and result sizes, save one file, or start the individual downloads with Download All.
What batch means here
One image compressor setting, up to 12 results
Add up to 12 supported images and the batch image compressor applies the same compression quality, resolution scale, and output format to every file. It reports each original-to-result size in a batch list, so a difficult PNG cannot hide behind the total savings of easier photos.
Download All starts individual downloads. It does not build a ZIP file or send the batch to a server. Some browsers ask permission before allowing multiple downloads. Use the per-file links when you want to inspect or save results one at a time.
Control the tradeoff
Quality, scale, and format solve different problems
A trustworthy image compressor makes the tradeoff visible. Start with format and quality, then reduce dimensions only when the destination does not need every source pixel.
| Control | Changes | Keeps | Best use |
|---|---|---|---|
| Quality | Lossy encoding detail | Pixel width and height | Smaller JPG or WebP photos |
| Resolution scale | Dimensions and fine detail | Aspect ratio | Oversized camera and website images |
| Output format | Compression method | Composition | Compatibility, transparency, or WebP savings |
| Batch | Number of files processed | Shared settings | Consistent catalogs, galleries, and attachments |
Choose by image content
JPG, PNG, and WebP compression behave differently
No image compressor format wins every time. Match the output to photographs, transparent assets, or modern web delivery rather than choosing by extension alone.
JPG for photographs
JPG is widely supported and responds directly to the quality slider. Low values reduce file size by discarding detail but can introduce blocks, ringing around text, and color bands.
PNG for transparency
PNG preserves exact edges and alpha transparency with lossless compression. A photographic PNG can stay large because the quality slider does not discard its pixel information.
WebP for modern delivery
WebP supports transparency and lossy encoding. It often gives this image compressor a smaller web-ready result than JPG at a similar visible quality, but test downstream compatibility.
A common surprise
Why can a “compressed” image become larger?
An already optimized file may have little waste left. PNG is lossless, tiny files have proportionally more container overhead, and converting a simple graphic to a photographic format can be inefficient. A quality number is not a guaranteed savings percentage.
When the image compressor is in batch mode at 100% scale and the same output format, it keeps the original if browser re-encoding would produce a larger file. If you deliberately change format or dimensions, compare the reported result because that safeguard no longer represents the same file recipe.
Useful batches
Where a bulk image compressor saves real work
Compress images online when a group needs the same destination, not simply because smaller is always better.
Article and landing-page images
Reduce file weight and oversized dimensions before publishing. Keep the page’s real display width in mind and retain originals outside the website build.
Product catalog photos
Apply consistent WebP or JPG settings across a small product set while checking labels, fabric texture, and color gradients.
Email and client review
Compress a batch of previews rather than sending full camera originals. Downloads remain separate files with descriptive output names.
Fixtures and interface tests
Create consistent lower-weight samples for galleries, upload components, thumbnails, and slow-network tests without using a remote image service.
Honest limits
“Without losing quality” needs a visual check
Lossy compression removes information even when the difference is hard to notice. Start around quality 75–85 for JPG or WebP, inspect faces, fine text, gradients, and sharp edges at the final display size, and keep the source for later editing or print.
The image compressor works in browser memory. Twelve huge phone photos can pressure an older mobile device, and it supports JPG, PNG, and WebP rather than every camera or design format. Process a smaller batch when memory is limited.
Related workflows
Choose the next image tool
Researched questions
Image compressor FAQ
Answers cover batch limits, real download behavior, format confusion, transparency, mobile memory, and the misleading promise of universal lossless savings.
How do I compress images online?
Open the image compressor, add one or more JPG, PNG, or WebP files, choose a quality, scale, and output format, then inspect the result sizes. Download one result or use Download All for the batch. Your originals remain separate.
Can I compress multiple images at the same time?
Yes. This bulk image compressor accepts up to 12 supported files per batch. Every image uses the same quality, resolution scale, and output format, which is useful for a consistent website, product catalog, or attachment set.
Does Download All create a ZIP file?
No. Download All starts the individual image downloads rather than creating a ZIP archive. Your browser may ask whether the site can download multiple files. You can also download each result separately from the batch list.
Can an image compressor work without losing quality?
Small savings can come from cleaner encoding or a better format with little visible difference, but meaningful lossy compression discards some data. Judge the preview at its actual display size and keep the originals for editing, print, or archival use.
Which output format usually creates the smallest image?
WebP often gives a compact result for modern websites, while JPG remains broadly compatible for photographs. PNG is best for transparency and sharp flat graphics but can be much larger for photos. The winning format still depends on the image content.
Why can a compressed PNG stay large or become larger?
PNG is lossless, so the quality slider does not remove detail the way JPG or WebP encoding does. Re-encoding can add overhead. At 100% scale and the same format, the compressor keeps the original when its generated result would be larger.
Does compression remove transparency?
PNG and WebP can preserve transparency. JPG cannot, so transparent pixels are placed over white when you convert to JPG. Check logos, cutouts, and shadows before choosing a batch output format.
Are images uploaded to a server?
No. Supported files are decoded, resized, and encoded with browser APIs on your device. The image compressor has no image upload endpoint. Temporary preview URLs are released when the page is cleared or closed.
What quality should I use for website images?
There is no universal best number. Start around 75–85 for JPG or WebP, view text, faces, gradients, and edges at the intended display size, then lower quality only while the result remains acceptable. Also avoid dimensions much larger than the rendered slot.
Does the batch image compressor work on mobile?
Yes, in current iPhone and Android browsers with Canvas support. A large batch of camera photos can use significant memory, so process fewer files or lower the resolution on older devices. Downloads are handled by the mobile browser.
Ready for a smaller batch
Compress images with every result measured
Open the image compressor, add one file or twelve, and compare the actual bytes before download.