Image compressor: questions and guides

Each guide here answers one question with a practical example, then takes you to the tool to try it yourself. Guides: 31.

Questions

How to reduce image size without losing qualityA practical way to shrink product photos before you upload them: which quality to pick, and when a file grows instead of shrinking. Runs in your browser.
How do I get a photo under 100 KB?A practical way to get a photo under 100 KB: when lowering quality is enough, when to resize first, and what the numbers look like on a real test photo.
An online application portal says my photo file exceeds the allowed size. What should I do?When an application portal rejects a photo for file size: how to get safely under the limit, and what to do when it also asks for specific dimensions or a format.
I compressed a photo I saved from WhatsApp and it came out larger. Why?Why a photo saved from WhatsApp or a website can grow when you compress it, and when the right call is to keep the file you have. With measured numbers.
What is the best way to shrink a large PNG screenshot that is mostly text?Screenshots full of text behave differently from photos. Measured numbers show why JPEG saves little here and why WebP is usually the better pick.
How do I make a transparent product cutout PNG lighter and keep it transparent?How to shrink a cutout PNG without its background turning white: why WebP is the pick, and when JPEG on a solid color is fine. With numbers from a real test.
Should I compress my store photos as JPEG or WebP?Is WebP always smaller than JPEG? Three real photos at the same quality give three different answers. How to pick a format for your store from a number, not a hunch.
Does setting JPEG quality to 100 mean no quality is lost?Quality 100 in JPEG and WebP is not lossless, and it can make a file two or three times bigger. Measured numbers and a plain explanation of what is going on.
Does quality 80 mean the file will be 80 percent of its original size?The quality number is not a size percentage. Four images at the same quality 80 went from 87% smaller to 36% larger. What the number really controls.
How do I compress a whole set of product photos at once and download them together?How to compress a set of product photos in mixed formats in one go, read the before and after total, and download everything as one ZIP with clear file names.
I have 150 catalog photos but the compressor takes 30 at a time. How do I handle them?A working plan for compressing a whole catalog in rounds of 30: what happens past the limit, how to keep results consistent across rounds, and when to press Reset.
Is it safe to compress a photo of my ID or residence permit online?Where the real risk lies with online compressors when the image is a personal document, how in-browser compression works without uploading, and what is still on you.
Does compressing a photo remove the GPS location and phone details stored in it?Compressing with this tool drops all EXIF data, including location, phone model and date taken. What you gain, what you may lose, and how to confirm it yourself.
My product photo shows up sideways after I upload it. Will compressing it fix that?Why a phone photo looks upright to you but sideways on a website, how compressing bakes the orientation into the pixels, and when you need a rotate tool instead.
How can I email a batch of project photos to a client without Gmail or Outlook refusing the size?Email size caps apply to the whole message. How to compress photos in one batch, read the total, and send them as a single ZIP that gets through.
WhatsApp makes my product photos look blurry. Should I compress them before sending?Why product photos arrive less sharp over WhatsApp, why heavy compression beforehand makes it worse, and how to send clear, light photos to your customers.
Should I compress an image before posting it to Instagram?Instagram processes every image you upload, so heavy compression beforehand doubles the loss. When to compress, at what quality, and why dimensions come first.
Do I need to compress images before uploading them to a Salla or Zid store?Does your store platform compress your images, or is that on you? Why compressing before upload keeps you in control, and how to prep photos that still zoom well.
PageSpeed Insights says to serve images in next-gen formats. How do I fix it?What the next-gen formats finding in PageSpeed Insights means, how to re-encode site images as WebP and measure the real saving, and why format alone may not be the win.
To make an image file smaller, should I resize it or compress it?Resizing removes pixels; compressing stores the same pixels in fewer bytes. A measured comparison of each on its own and both together, and when one is enough.
Lighthouse flags 'efficiently encode images' on my site. What does it want?The 'efficiently encode images' finding usually means JPEGs saved at a higher quality than needed. How to find them, re-encode them and clear the finding, with numbers.
My product catalog PDF made from photos is huge. How do I make it lighter?A PDF built from photos carries each photo's full weight. How to compress the photos before building the catalog, and why JPEG beats WebP in this particular case.
After compressing my sale poster, the text and price have fuzzy halos around the letters. How do I fix it?Why text and prices on a sale poster get halos after JPEG compression, and why WebP gives a result that is both cleaner and smaller. Numbers from a real test.
If I compress the same image several times, does it lose quality every time?Every new compression adds a little damage, while the size barely moves after the first pass. Numbers from five passes in a row, and a simple rule that protects you.
How do I shrink iPhone photos before uploading them to my shop?iPhone photos are often HEIC, which the compressor does not accept. When a photo arrives as JPEG on its own, when you must convert, and how to compress on the phone.
Will compressing my product images lower their resolution below what Amazon or Noon checks?The resolution marketplaces check is pixel dimensions, and compression does not change it. Resolution vs file size vs sharpness, and what can actually suffer.
Why do I get an error when I choose WebP output on my iPhone or in Safari?Some browsers can show WebP images but cannot save them, and quietly produce PNG instead. Why the tool shows a clear message instead, and your practical options.
I compressed my images to WebP and the platform will not accept the upload. What now?When a platform rejects WebP files, do not convert the compressed copies to JPEG; compress the originals again. Numbers show the quality gap between the two routes.
How does this compressor differ from sites that upload your images to their servers?An honest comparison of in-browser compression and sites that upload your images to their servers: privacy, speed, limits, formats, and what this tool lacks.
My phone photos of expense receipts take up a lot of space. How do I shrink them and keep them readable?How to compress phone photos of expense receipts without losing the small print, how to check legibility before archiving, and when to keep the originals.
How do I lighten portfolio images for Mostaql or Khamsat without making my designs look cheap?In a portfolio the image is the product. How to lighten design images for Mostaql and Khamsat while keeping gradients, fine lines and text clean, with measured numbers.