How do I compress an image to 100KB?

Add your photo above and download the result. The 100 KB target is already set: the tool lowers the JPG quality step by step, and the pixel size only if it must, until the file is just under 100 KB.

How do I reduce photo size to 100 KB on my phone?

Open this page in Chrome or Safari, tap to pick a photo or take a new one, then download. It works on Android and iPhone with nothing to install.

Does it change the width and height?

Only if it has to. The tool first lowers the quality at full size, and shrinks the image only when 100 KB is still out of reach.

Will my photo look blurry?

No. At 100 KB most photos look the same as the original on screen.

Can I make it exactly 100 KB?

The result lands just under the limit, usually within a few percent of 100 KB, so the form never rejects it for being too big.

My form asks for 50 to 100 KB. What should I do?

Many forms ask for a photo between 50 and 100 KB. Compress here and the file lands just under 100 KB, inside the range. If your photo is already smaller than 50 KB, increase its size in KB instead.

How do I convert an image to JPG under 100KB?

Add a PNG, HEIC, WebP or JPG photo. The result is always a JPG just under 100 KB, so converting and compressing happen in one step.

My form wants a PDF under 100 KB, not a JPG. What do I do?

Use JPG to PDF under 100 KB: it turns one photo or several pages into one PDF under 100 KB. A PDF upload field rejects a JPG even when the size is right.

Is my photo uploaded?

No. Compression runs in your browser on your own device. The photo never reaches our servers.

Can I compress many photos at once?

Yes. Drop several photos and each one is compressed to the same target. Download them one by one or together as a ZIP. For a large batch, the bulk image compressor is made for it.

Compress Image to 100KB

Reduce any photo to under 100 KB in a few seconds, keeping it sharp. The 100 KB target is already set, so just add your image.

Under 100 KBJPG Runs on your device

Compress to 100KB · Step 1 of 3 · Add your photo

Drop a photo to compress it under 100 KB

or paste with Ctrl+V · JPG PNG WebP HEIC GIF · max 25 MB

Under 100 KB · JPGBatch ready

Processed on this device. Nothing is uploaded.

Example

Before and after

We ran this sample through the compress to 100kb tool above. The numbers under each image are measured from the real files.

Sample input: 4160 x 6240 px · 3.2 MB · JPG — **Before**4160 x 6240 px · 3.2 MB · JPG

Result from this tool: 2080 x 3120 px · 95.5 KB · JPG — **After**2080 x 3120 px · 95.5 KB · JPGShown smaller here

How to

How to compress Image to 100KB

01
Add your photo
Drag a photo in, paste it with Ctrl+V or pick one from your files.
02
Keep the 100 KB target
The size is already set to 100 KB. Change it only if your form asks for a different limit.
03
Download
Save the result. It is ready to upload straight away.

Why this size

When a 100 KB limit makes sense

Many online forms and website builders stop at 100 KB. At this size a photo still looks sharp on screen, and pages and uploads stay quick.

Most photos reach 100 KB with quality changes alone, so the dimensions usually stay exactly as they were.

Upload	Typical limit
Online form	100-200 KB
Profile photo	50-100 KB
Document scan	100-300 KB
Website image	100-200 KB

Use cases

When you need a 100 KB photo

Online forms

Bank, insurance and government forms with a 100-200 KB cap.

Website images

Blog and product photos that load fast and still look sharp.

Email

Several photos in one email without hitting attachment limits.

CMS uploads

WordPress, Shopify and other platforms with upload limits.

Document scans

Receipts, certificates and ID cards that need to stay readable.

Classified ads

Marketplace listings that load quickly on phones.

Tips

Tips that make a difference

1.
Crop first. Cropping to just the face or document removes pixels you do not need, so the quality can stay higher.
2.
Use JPG. JPG gets much smaller than PNG for photos. Use PNG only if the form asks for it.
3.
Check the dimensions too. Some portals also require a size such as 3.5 x 4.5 cm or 200 x 230 px. Set both to avoid a second rejection: resize in cm or in pixels first, then compress.
4.
Plain backgrounds compress better. A plain wall behind you leaves more of the 100 KB for your face.
5.
Check the minimum too. Some forms also set a lower limit, such as 50 to 100 KB. A photo under the minimum is rejected as well.

FAQ

Compress to 100KB: questions

How do I compress an image to 100KB?: Add your photo above and download the result. The 100 KB target is already set: the tool lowers the JPG quality step by step, and the pixel size only if it must, until the file is just under 100 KB.
How do I reduce photo size to 100 KB on my phone?: Open this page in Chrome or Safari, tap to pick a photo or take a new one, then download. It works on Android and iPhone with nothing to install.
Does it change the width and height?: Only if it has to. The tool first lowers the quality at full size, and shrinks the image only when 100 KB is still out of reach.
Will my photo look blurry?: No. At 100 KB most photos look the same as the original on screen.
Can I make it exactly 100 KB?: The result lands just under the limit, usually within a few percent of 100 KB, so the form never rejects it for being too big.
My form asks for 50 to 100 KB. What should I do?: Many forms ask for a photo between 50 and 100 KB. Compress here and the file lands just under 100 KB, inside the range. If your photo is already smaller than 50 KB, increase its size in KB instead.
How do I convert an image to JPG under 100KB?: Add a PNG, HEIC, WebP or JPG photo. The result is always a JPG just under 100 KB, so converting and compressing happen in one step.
My form wants a PDF under 100 KB, not a JPG. What do I do?: Use JPG to PDF under 100 KB: it turns one photo or several pages into one PDF under 100 KB. A PDF upload field rejects a JPG even when the size is right.
Is my photo uploaded?: No. Compression runs in your browser on your own device. The photo never reaches our servers.
Can I compress many photos at once?: Yes. Drop several photos and each one is compressed to the same target. Download them one by one or together as a ZIP. For a large batch, the bulk image compressor is made for it.

Checked

How we checked this page

Checked by the SizePort team on 3 October 2026.

We test the tool with sample photos before it goes live and check that the sizes on this page match what it produces. Rules and platforms change, so if something here is out of date, tell us and we will correct it.

How the tool works

The compressor first lowers the JPG quality at full resolution, testing several settings until the file is just under the target. Only if quality alone cannot get there does it reduce the width and height, a little at a time. The result is a JPG. Everything happens in your browser; your images are never uploaded.