Compress Images to 50 KB, 100 KB or 200 KB
Compress an image to 50 KB, 100 KB, 200 KB or a custom size. Keep original dimensions, check the result and download it. No file upload required.
Let’s compress image.
Add image files to get started.
Three steps. One less task.
- 01
Choose your file, or drag it into the workspace.
- 02
Set your target size in KB and decide whether to keep the original dimensions.
- 03
Download the result and check it before sharing.
Good to know
Fitabyte aims to stay below your size limit; the result may be smaller. A 50 KB target can require lower resolution than 100 KB or 200 KB. Compare the output before sharing it.
Compress an image to 50 KB, 100 KB or 200 KB
Choose the size preset that matches your upload form, then check the downloaded file's size, dimensions and format. Fitabyte treats 1 KB as 1,024 bytes: a 100 KB preset allows 102,400 bytes. If a portal uses a strict 100,000-byte limit, choose 97 KB to leave a small margin.
Keep original dimensions is enabled by default. Leave it on when a form requires a fixed width and height. If the target cannot be reached, increase the size limit or allow resizing only when the destination permits it. Inspect faces, small text and edges at full size before using the result.
One image. Three measured size targets.
We processed a synthetic 1,200 × 900 JPG of 459,374 bytes with the actual Fitabyte compressor. Original dimensions were locked for all three runs.
| Target | Output | Dimensions | Result |
|---|---|---|---|
| 50 KB | 50,667 bytes | 1200 × 900 | Fits target · JPG |
| 100 KB | 99,598 bytes | 1200 × 900 | Fits target · JPG |
| 200 KB | 202,441 bytes | 1200 × 900 | Fits target · JPG |
Download the original test image and repeat a target above. Open the original and output at 100% zoom: meeting a byte limit does not guarantee acceptable detail.
Measured on 26 October 2026 with Node v24.22.1 and a native canvas adapter (1.0.7). Browser encoders can give different byte counts. This synthetic scene is one example, not a quality promise for your own images.
A few things you might ask.
Will my photo be exactly 100 KB?
The target is a maximum, not an exact output size. Fitabyte does not pad the result with extra bytes. A directly supplied JPG, PNG or WebP that already fits is returned unchanged. HEIC and HEIF are decoded to a fresh PNG first, so that shortcut is checked against the decoded PNG. Difficult images can remain above the target, especially when their dimensions are locked.
Does compressing an image change its format?
When compression is needed, JPG stays JPG, while PNG and WebP export as WebP. If your upload form accepts only JPG, use Convert image first, then compress the JPG copy. Check the downloaded extension before uploading.
Which is better: 50 KB, 100 KB or 200 KB?
Use the largest size the destination permits. A 50 KB budget usually leaves less room for fine detail than 100 KB or 200 KB. Pixel dimensions, image complexity and format also affect the result; a preset is not a quality guarantee.
Are my files uploaded to a server?
This tool processes files on your device. Moving a file between Fitabyte tools uses a one-use browser handoff that expires after 10 minutes; abandoned handoffs are cleared on your next visit. Your original stays unchanged.
Can I use this tool on my phone?
Use a current browser and keep the tab open during processing. Available memory and processing speed depend on your device; start with a smaller file for large PDFs or video.