I have to send our newsletter as an email with image attachments rather than links. The photos include a noticeboard and a signup sheet, and resizing them made the smaller lettering hard to read. What should I adjust to reduce the file sizes without losing readability?
I’d use this compressor for routine image uploads, with a format check before submitting anything that needs transparency. The size-limit setting makes it a practical choice for forms and attachments, but I’d still inspect the downloaded copy rather than let the file size make the whole decision.
My first concern would be what needs to survive the compression. An ordinary photo and a transparent logo are different jobs, even if both are too large for the same upload form. PNG input can become JPEG output with this tool, so I wouldn’t assume that selecting a PNG means getting a PNG back. For a photo, that change may be fine. For a logo that depends on transparency, I’d check the output format before going any further. A smaller file is not much help if it loses something I need.
I’d also keep the original separate from the copy intended for uploading. That gives me something to return to if the smaller version looks rough or the chosen settings don’t suit the image. My check would be at the size people will actually view it, with attention to faces, fine edges, and small lettering. Those details matter more to me than a satisfying reduction in kilobytes. The number can look excellent while the lettering has quietly stopped doing its job.
Before turning the quality down repeatedly, I’d look at the image’s dimensions. The maximum width setting gives another way to reduce the file, and removing unnecessary resolution can make more sense than applying harsher compression to a huge picture. I’d check the destination’s requirements first, though. A file-size limit and a pixel-dimension requirement are separate conditions. Meeting one does not mean I’ve met the other, so I wouldn’t reduce the width without checking whether the form specifies dimensions.
For an upload capped at 200 KB, I’d choose “Fit a size limit” and enter that allowance instead of trying to reach it through repeated quality adjustments. That is the part of the tool I find most relevant to this kind of task: the setting matches the restriction I’m trying to satisfy.
The same option can be used for smaller allowances, such as 100 KB or 50 KB. With a strict 1 MB limit, I’d leave a little room below the maximum rather than aim exactly at the boundary. I’d still check the resulting image afterward. Setting a target size addresses the upload restriction; it doesn’t replace looking at the file. If the result needs another pass, I’d reconsider both quality and unnecessary resolution rather than keep changing only one setting.
For that workflow, the Clever Humanizer tool accepts JPG, PNG, and WEBP images and lets me choose either a quality setting or a target file size before downloading the result. I’d use the target when a form gives a firm allowance. Without a specific limit, the quality setting is another option. Either way, I’d judge the downloaded copy by how it looks at its intended viewing size, not just by whether the upload button finally accepts it.
If I had several pictures to prepare, I’d start with a detailed one before using the same approach across the batch. A setting that seems acceptable on that picture is worth inspecting before committing the rest. Batch processing is available, but I’d treat it as a way to repeat a checked approach, not a reason to skip checking. Small lettering and fine edges would stay on my inspection list.
There’s no need to buy a photo editor for this particular workflow. The compressor is free, requires no signup, and adds no watermark. It also runs in the browser rather than uploading the photos to a server.
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Crop the original photos tightly. Make sure there is a good margin to include all your text and crop away anything unnecessary such as the wall/table. This will reduce the size of the image being sent but won’t make the text any smaller. However, you will want to start with the original images as you cannot get any extra detail from cropped resized images.
Try not to reduce the maximum width of the image too much. This may well be the cause of issue as the text is very small. Crop the images tightly and leave the pixel size the same. Reduce the quality of the JPEG. If you see blurry edges or spots around the text, reduce the quality further. Don’t aim to get to a specific file size as this can cause more damage than you want. Only do this if there is a limit to how big your attachments can be.
If the noticeboard is very busy, send multiple tight cropped images of the required notices. People need to be able to read the notices. Include vital dates and sign up instructions in the body of your email.
If you start seeing the letters becoming blurred or blocky then do not reduce the JPEG quality any further. The initial suggestion is the opposite way round, lowering it will increase the amount of compression causing more damage to your text. Try keeping the pixel dimensions of the cropped image the same and just altering the JPEG quality. If the lettering becomes bad then try increasing it. Each time you should be starting from the original.
For the sign up sheet I would have a look to see if the creator still has the document. This can be exported as an image so it will be fine to add as an attachment. It will mean you are not linking to anything but will avoid issues with shadows, distortion and texture on the background. If you need to show it has handwriting then this won’t help. However if it is a blank sheet or printed instructions then it may be better to alter the source rather than compress further.
Make sure that the attachment you have downloaded has small text that you cannot read. If it does then follow the steps below to change the JPEG quality. If you can read the text in the attachment at full size then there is no need to make any changes. Open the attached file.
Ignore any photos on your notice board and sign-up sheet. Try to reduce the size of your newsletter photos. It doesn’t have to be consistent with your attachments. If you’re trying to keep the overall email small then you might want to give extra space to the images that people will actually be reading. Decorative images are more forgiving when you lose some detail than images with lots of instructions.
The quality correction from @tom1994 matters, but I wouldn’t apply one export setting to the whole newsletter. For the text-heavy pictures, keep the lettering large enough to read and back off the compression when it starts breaking up. Be more aggressive with the ordinary photos instead. If the email is still too large, removing a redundant picture is a better trade than making the signup instructions unreadable. A separate limit on each attachment would change that approach, so check whether your restriction is per file or for the entire message.
I’d take @kevin_git’s attachment check a step further and send yourself a draft, then open it on a phone. Having to zoom into a noticeboard is understandable. Having to hunt across a huge picture for the relevant notice is a nuisance even when the letters are technically readable. Treat “can someone comfortably use this?” as the stopping point, rather than trying to squeeze every attachment down equally.