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Under1MB

Guides to getting images to the right size and format

Straight answers to the image problems that actually stop people: an upload form demanding 20 KB, a HEIC photo nothing will open, an AVIF file your printer rejects.

A large image file shrinking down to a 100 KB file
Compression

How to Compress an Image to 100 KB (Without Wrecking It)

Portals ask for 100 KB. Cameras give you 5 MB. Here is how the gap actually closes — and the one setting most tools get wrong.

18 August 2026 · 6 min read

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Every article links to a tool that does the job in your browser.

Questions about the blog

What does the Under1MB blog cover?+

Practical guides to image size and format problems: hitting an exact KB limit, choosing between JPG, PNG, WEBP and AVIF, and handling iPhone HEIC photos.

Are the guides specific to any country or portal?+

The size-limit guides use the limits people meet most often, including Indian exam and recruitment portals, but the methods apply to any upload form anywhere.

Do I need an account to use the tools mentioned?+

No. Every tool linked from these articles is free, needs no signup, and runs entirely inside your browser.

Do the tools upload my images?+

Never. Images are decoded and re-encoded on your own device, so nothing is sent to a server.

How often are new articles published?+

New guides go up as we cover more formats and size targets. Existing articles are updated when browser support changes.

Can I suggest a topic?+

Yes — use the Contact us link in the footer with the problem you are trying to solve and we will look at covering it.

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