JPEG Compressor – Compress JPG Images Online
Compress up to 20 JPEG or JPG images locally in your browser, compare the original and resulting sizes, and download one image or the complete batch as a ZIP file.
Use this free JPEG compressor to reduce the encoded size of one or multiple JPG or JPEG images. Compression happens locally in your browser, preserves the image dimensions, compares every result with its original file, and keeps the original bytes whenever recompression would produce an equal or larger file.
How JPEG Compression Works
JPEG uses lossy compression, which reduces file size by discarding some visual information. This utility decodes each selected image and re-encodes it using a fixed quality setting of 82. The result aims to provide a useful balance between file-size reduction and visual quality, but the amount saved and any visible difference depend on the image.
The Compressor Never Chooses a Larger Result
After re-encoding an image, the utility compares the new file size with the original. If the new JPEG is smaller, it becomes the downloadable result. If it is the same size or larger, the original file bytes are retained instead, producing zero savings without increasing the download size.
Compress Multiple JPEG Images
You can process up to 20 images in one batch, subject to a limit of 20 MB per image and 100 MB for the complete selection. Files are processed one at a time. A single result is downloaded as a JPEG, while multiple results are packaged together in a ZIP archive.
Image Dimensions Are Not Resized
The utility changes JPEG encoding rather than intentionally resizing the image. The original pixel width and height are preserved, making the result suitable when you need a smaller file without requesting different dimensions.
What Happens to EXIF and Other Metadata?
A successfully re-encoded JPEG is created from its decoded image data and normally does not retain the original EXIF, GPS, camera, thumbnail, or other embedded metadata. If recompression would increase the size and the original file is retained unchanged, its existing metadata remains.
Private Browser-Based Compression
The selected images are decoded, compressed, compared, and packaged locally in your browser. They are not uploaded to ORVITech or stored on an external compression server.
How to Compress JPEG Images
Choose or drag and drop one or more JPG or JPEG files and select Compress JPEG Images. Review the original size, resulting size, bytes saved, and percentage reduction for each image and the complete batch. Then download the individual result or ZIP archive.
Why Compress a JPEG File?
Smaller images can be faster to upload, download, email, share, archive, and deliver on a website. Reducing image size can save storage and bandwidth and may improve page-loading performance, provided the resulting visual quality remains appropriate for its intended use.
JPEG Compression Example
Suppose you select four JPEG photos with a combined size of 18 MB. If the resulting images total 7.2 MB, the report will show that 10.8 MB was saved, equivalent to a 60% reduction, and provide one ZIP file containing the four results. This is only an example; actual savings vary according to image detail, noise, dimensions, and previous compression.
Frequently Asked Questions
How do I compress a JPEG or JPG image?
Select one or more JPEG files and choose Compress JPEG Images. The utility processes them locally, reports the original and resulting sizes, and provides the files for download.
Are JPG and JPEG the same format?
Yes. JPG and JPEG refer to the same image format. The .jpg extension became common when older systems limited file extensions to three characters.
Can I compress multiple JPEG images at once?
Yes. You can process up to 20 images in one batch. Each image can be up to 20 MB, and the total selected size cannot exceed 100 MB.
What JPEG quality does the compressor use?
Successfully compressed images are re-encoded with a fixed quality setting of 82. There is no manual quality selector.
Is JPEG compression lossless?
No. JPEG recompression is lossy and can discard visual information. The fixed setting aims for a practical balance, but you should inspect important images before replacing their originals.
Will compression resize my image?
No intentional resizing is performed. The compressor preserves the image’s pixel dimensions while changing its JPEG encoding.
Can compression make my image larger?
The attempted re-encoding can produce a larger file, but the utility compares both versions and retains the original bytes whenever the new result is not smaller.
Why did the report show zero savings?
The image was probably already compressed efficiently. If re-encoding does not create a smaller file, the original is kept and the reported reduction is zero.
Why did my JPEG shrink very little?
The image may already be optimized, or it may contain complex detail, texture, gradients, or noise that requires more data. Compression savings vary considerably between images.
Does the compressor remove EXIF metadata?
Successfully re-encoded images normally lose their original EXIF and other embedded metadata. If the original file is retained because it is smaller, its metadata remains unchanged.
Should I repeatedly compress the same JPEG?
Repeated JPEG recompression can progressively reduce visual quality. For the best result, compress from the highest-quality original available and keep a separate copy of that original.
How are multiple compressed images downloaded?
When more than one image is processed, every resulting JPEG is placed in a single ZIP archive. Duplicate source filenames receive unique output names.
Are my images uploaded or stored?
No. Compression and ZIP creation happen locally in your browser. The selected images are not uploaded to ORVITech or stored on an external server.
Why might a large batch fail?
JPEG files expand in memory while being decoded. Available device memory and browser limits can affect very large or high-resolution images even when the selected files are within the stated limits.