Reduce an image's file size and check the result before saving. Stronger compression can also reduce detail.
Process files directly in your browser. No registration is required.
Reduce image file size for uploads, email attachments, and web pages. Higher compression can affect fine details, so compare the visual result as well as the file size before saving.
Start with the exact task and the output required by the destination. A clear goal helps you choose only the settings that matter.
Use the same inputs and definitions when comparing alternatives. Otherwise, the difference may come from inconsistent assumptions rather than the option itself.
Keep a short record of important conditions if you may need to repeat the task or explain the result to someone else.
Controls how the compressed result looks. The effect depends on the image format and encoding method.
When you see this item in the interface or source material, confirm its definition instead of assuming it means the same thing in every context.
The amount of data needed to store the image. Photos and flat illustrations often compress differently.
This matters most when you compare results or prepare an output for another person. Keep the same definition throughout the task.
The image width and height. Compression changes file size; resizing changes dimensions.
If the source uses a different unit, naming convention, or rule, convert or clarify it before continuing.
Before saving or sharing, compare the output with the original and confirm that the intended information is still present.
When comparing options, write down the assumptions beside each result so that the numbers or files are not mistaken for equivalent outputs.
If another person will use the result, include enough context for them to understand what was changed and which version is final.
Start with a moderate setting and inspect text, edges, and fine detail. Check the actual file type and not only the filename extension.
Keep the original until the compressed version has been checked. Check whether the file size and number of pages are within the tool’s supported limits.
Check the destination’s size, dimension, and format requirements before uploading. Open the output to verify image quality, page order, encoding, or archive contents.
Some images are already optimized, and detailed photos may be harder to compress. Check whether the pixel dimensions also match the intended use.
Depending on the format and quality setting, fine text or edges can change. Preview the result at a useful zoom level before saving.
JPG often suits photos, while PNG may be needed for transparency or crisp interface graphics. Choose based on the image and its destination.
Not necessarily. Use the resize tool when pixel dimensions need to change.
Compare detail, colour, transparency, file size, and any upload requirements.
If a file will not process, first confirm that its extension matches its actual format, that the file is not damaged, and that its size is supported. A renamed extension does not convert the contents. For an important file, keep the original and test with a copy. Browser-based processing and external services may handle data differently, so check the privacy information for this specific tool before using confidential material.