Targets a KB size automatically
A multi-step search combines quality reduction and, if needed, downscaling — so you get the smallest acceptable-looking file for your exact size limit.
Reduce Image Size
Reduce image size online toward a target KB value. The tool adjusts quality and dimensions automatically, keeps the original format, and is free to start.
- Targets a KB size automatically
- No manual trial and error
- Encrypted upload, automatic cleanup
- Free to start
Choose your file
Drop files here or click to upload
JPG, JPEG, PNG, WEBP· up to 20.0 MB per file
Files are private and deleted after conversion
Anonymous files: 20 MB. Free accounts: 50 MB and batches of 5. Paid accounts: 200 MB and batches of 100.
Why use this Reduce Image Size?
Reduce image size online toward a target KB value. The tool adjusts quality and dimensions automatically, keeps the original format, and is free to start.
No manual trial and error
You never have to guess a quality percentage and re-download repeatedly — the algorithm runs the whole search for you in one pass.
Encrypted upload, automatic cleanup
Uploads travel over HTTPS, and both the original and the resulting file are deleted automatically within 24 hours.
Free to start
Anonymous visitors get 1 free server-side operation, and free accounts receive 3 conversions every 30 days.
How to use the Reduce Image Size
- 01
Upload your image
Add the photo you need to shrink to a specific file size, such as for an application form or email attachment limit.
- 02
Enter your target size in KB
Type the maximum size you need, for example 200 KB — no need to guess a quality percentage yourself.
- 03
The tool searches automatically
Quality is stepped down from 80 toward 32 first; if the file is still too big, the tool then scales down the dimensions in ×0.8 steps until it fits.
- 04
Get the closest match
The search is best-effort: if your exact target cannot be reached, you still receive the closest result the tool achieved.
- 05
Download the file
Save the result, sized to fit your requirement — ready to upload or attach right away.
Best source settings for the Reduce Image Size
Choose settings that match the result you need.
↔ Swipe sideways to view every column.
| Need | Recommended setting | Best for |
|---|---|---|
| Target size (KB) | Enter the maximum file size you need, in kilobytes. The tool then searches for the best match automatically: it steps the quality down from 80 to 32, and if that is still not enough it scales the image down in ×0.8 steps until the file fits. The search is best-effort — if the target cannot be reached, you receive the closest result it achieved. | Enter the maximum file size you need, in kilobytes. The tool then searches for the best match automatically: it steps the quality down from 80 to 32, and if that is still not enough it scales the image down in ×0.8 steps until the file fits. The search is best-effort — if the target cannot be reached, you receive the closest result it achieved. |
- Upload your image
- Add the photo you need to shrink to a specific file size, such as for an application form or email attachment limit.
- Enter your target size in KB
- Type the maximum size you need, for example 200 KB — no need to guess a quality percentage yourself.
Reduce Image Size input and output
Review what the tool accepts, how it processes the file, and what it produces.
↔ Swipe sideways to view every column.
| Feature | JPG | PNG |
|---|---|---|
| Format | JPG | PNG |
| Processing | Secure cloud processing | Secure cloud processing |
| Result | Reduce image size online toward a target KB value. The tool adjusts quality and dimensions automatically, keeps the original format, and is free to start. | Reduce image size online toward a target KB value. The tool adjusts quality and dimensions automatically, keeps the original format, and is free to start. |
Where to use files from the Reduce Image Size
The output is ready for common workflows supported by its format.
- Targets a KB size automatically
- A multi-step search combines quality reduction and, if needed, downscaling — so you get the smallest acceptable-looking file for your exact size limit.
- No manual trial and error
- You never have to guess a quality percentage and re-download repeatedly — the algorithm runs the whole search for you in one pass.
- Encrypted upload, automatic cleanup
- Uploads travel over HTTPS, and both the original and the resulting file are deleted automatically within 24 hours.
- Free to start
- Anonymous visitors get 1 free server-side operation, and free accounts receive 3 conversions every 30 days.
About the formats
JPG
JPG (also written JPEG) is the most widely used lossy image format for photographs, standardized by the Joint Photographic Experts Group in 1992. Practically every camera, phone, and image application can create and open it.
Its strengths are small file sizes for photos and universal compatibility across devices, browsers, and software. The trade-offs: lossy compression introduces artifacts, there is no transparency support, and quality degrades a little more with every re-save. Use JPG for photographs; choose PNG for screenshots, logos, or anything that needs sharp edges or transparency.
PNG
PNG is a lossless raster image format created in the mid-1990s as a patent-free replacement for GIF. It is the standard choice for screenshots, logos, UI graphics, and any image that needs transparency.
PNG preserves every pixel exactly and supports a full 8-bit alpha channel, so text and sharp edges stay crisp. The downside is size: photographs saved as PNG are far larger than the same image as JPG or WebP. Support is universal in browsers and editors, making it a safe default for graphics — just avoid it for large photo collections.
WebP
WebP is a modern image format developed by Google that supports both lossy and lossless compression, along with transparency and animation. At comparable visual quality it usually produces noticeably smaller files than JPG or PNG.
Every current browser supports WebP, which makes it an excellent default for web delivery. Outside the browser the picture is mixed: older desktop software, some email clients, and legacy systems may fail to open it. If a recipient cannot view a WebP file, convert it to JPG for photos or to PNG when transparency must be preserved.
Privacy and file handling
This tool uses secure cloud processing for formats or operations browsers cannot handle reliably.
- Secure transfer
- Files are transferred over HTTPS and used only for the requested operation.
- Automatic deletion
- Inputs are removed within 6–24 hours and generated outputs within 24 hours.
- Private downloads
- Results are delivered with expiring signed download links.
Reduce Image Size troubleshooting
- The result is still over my target size
- Very detailed or noisy images simply cannot always reach tiny targets — even at the minimum quality of 32 and after several downscale rounds, the pixels still need somewhere to go. In that case the tool returns the closest result it achieved. Shrink the image first with the Resize Image tool (a smaller width helps enormously), or allow a slightly larger target.
- The output has smaller dimensions or looks blurrier than I expected
- Once the quality floor of 32 is reached, the tool starts scaling the image down to keep chasing your target — that is why the dimensions changed. If keeping the original dimensions matters more than the exact size, set a larger target in KB so the quality steps alone are enough.
- My file is rejected before compression even starts
- Check the upload limits: 20 MB for anonymous visitors, 50 MB for free accounts and 200 MB for paid accounts. Sign in or upgrade to process bigger files — uploads travel over HTTPS and both inputs and outputs are automatically deleted within 24 hours.
FAQ
- Can I target a specific file size?
- Yes. Set a target size and we step quality down (and downscale if needed) to get as close as possible while keeping the image usable.
- Is the conversion private?
- Yes. Your files are processed securely and deleted after conversion. We never share your photos.
- Is there a file size limit?
- Free accounts can upload files up to 50 MB. Paid users can upload up to 200 MB.
- How does the tool reach my target size?
- It steps quality down from 80 to 32, then scales dimensions by ×0.8 when needed. The result is best-effort.
- Why is the result still over my target?
- Detailed images may stay above a tiny target even at quality 32 after several resize rounds. Try a larger target or resize first.
- Why did the output's dimensions change?
- At the quality floor of 32, the tool scales dimensions down to keep approaching your target.
- How is this different from Compress Image?
- Compress Image lets you set the quality directly; Reduce Image Size instead searches automatically for a specific KB target, adjusting quality and dimensions for you.
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Ready to use the Reduce Image Size?
Reduce image size online toward a target KB value. The tool adjusts quality and dimensions automatically, keeps the original format, and is free to start.
Reduce Image Size