Reach one of the strictest image size limits using a two-stage compression algorithm. Perfect for government portals, exam forms, and other tight upload requirements.
Last updated: August 2026
10KB
Exact Target
All Formats
Input Support
Smart
Two-stage Algo
Private
No Uploads
Drop image here to compress to 10KB
JPEG, PNG, WebP, AVIF, HEIC. All processing stays in your browser.
Want to compare against a looser limit? Change the target field above, no need to drop the file in again.
Five steps is all it takes. Everything runs in your browser so there is no waiting for an upload or server processing.
Set your target
The target is pre-set to 10KB. You can adjust it to any value if your portal has a different limit.
Drop your image
Drag and drop a JPEG, PNG, WebP, AVIF, HEIC or HEIF file onto the tool. No upload happens. The file stays on your device.
Quality search, then dimension scaling if needed
The tool runs a quality search first, then reduces pixel dimensions in steps if quality alone can't reach 10KB without looking bad. This runs in a background worker, so the tab stays responsive.
Fine-tune without starting over
Change the target or switch between JPEG and WebP afterward and the tool recompresses automatically.
Download the result
Preview and size stats appear. Download the compressed file immediately.
A 10KB ceiling is rare but not unusual on legacy government systems, older scholarship portals and forms that were built to serve users on very slow connections. It often appears on signature upload fields rather than photograph fields, because a scanned signature is a simpler image that compresses more aggressively.
What to expect at 10KB
At this size, a colour photograph will have visible compression and reduced dimensions. The image will still be clear enough for document submission. If quality is critical and the portal accepts 20KB or 50KB, use the higher target for better results.
10KB is genuinely tiny. To give you a sense of scale, a single second of a phone call audio file is roughly 8KB. A plain text email with no formatting is usually under 5KB. Getting a recognisable photograph into that space requires aggressive compression, and in most cases it also means reducing the pixel dimensions. The result won't look sharp at full screen, but that's not what these portals are asking for. They're asking for enough visual information to confirm identity or validate a signature, and 10KB is usually enough for that.
The most important thing you can do before compressing is check what the portal actually needs the image for. If it's a signature upload field, a scanned signature on a white background compresses extremely well because most of the image is plain white. A 400 by 150 pixel signature at 10KB will look perfectly clean. If it's a passport-style photo, expect some visible compression and a smaller output resolution, but the image will still be clear enough to submit.
JPEG compression works by identifying regions of similar color and encoding them together. A region of pure white takes almost no space because there's nothing to describe. A complex photograph with thousands of different colors and gradients takes much more. A black signature on a white background is almost entirely one color (white) with a small amount of detail (the black ink). That structure compresses to a tiny file size while keeping the actual signature legible. That's why signature upload fields so often have 10KB or even lower limits: they were designed assuming that's what would be submitted.
The tool always tries quality reduction first, searching for the highest setting that fits under 10KB. For a photograph rather than a simple scan, even the lowest quality setting can still overshoot, or produce a result too degraded to be worth keeping. When that happens, the tool steps the pixel dimensions down, roughly 75%, then 50%, 35%, 25% and 15% of the original size, re-running the quality search at each smaller size until it finds one that both fits 10KB and clears a minimum acceptable quality. All of this runs in a background Web Worker, so even working through several attempts doesn't freeze the page. This is exactly the kind of tight target this fallback exists for, at a looser target like 1MB it almost never triggers.
If the compressed result looks too degraded for your use case, and the portal doesn't explicitly say 10KB is the maximum, check the portal's help documentation. Many portals list a range, like "between 10KB and 50KB," which means you have room to use a higher target. Even going to 20KB or 50KB makes a significant difference in the output quality. Since the tool now recompresses automatically when you change the target, comparing 10KB against 20KB takes a single edit rather than starting over. The jump from 10KB to 20KB is roughly double the data, which at these small sizes translates to noticeably sharper results.
Expecting a full-color photo to look sharp at 10KB
At this size, a detailed color photo will show visible compression and usually smaller dimensions too. Signatures and simple scans on a plain background hold up far better, since there's much less detail to encode.
Assuming quality adjustment alone will hit 10KB
Unlike looser targets like 1MB or 2MB, at 10KB the tool very often needs to reduce pixel dimensions as well as quality. That's expected behavior here, not a sign anything went wrong, check the result panel for the scale factor used.
Choosing JPEG for a transparent signature scan
If the source PNG has a transparent background, JPEG will fill it with a solid color. The tool warns about this and offers a one-click switch to WebP, which keeps transparency.
Not checking whether the portal's limit is actually a range
Some portals state something like "between 10KB and 50KB," which means there's room to use a higher target for a noticeably better result. Check the portal's help text before assuming 10KB is a hard ceiling.
Re-dropping the file just to compare a different target
That's no longer necessary. Changing the target size field after a result already appears recompresses automatically using the same cached image, useful for quickly comparing 10KB against 20KB or 50KB.
Ignoring the warning that the target wasn't fully reached
For an unusually detailed source image, the tool may not be able to hit 10KB at an acceptable quality even after scaling down. When this happens it still delivers its best attempt but flags it on the result panel, worth a second look before submitting.
A 10KB image limit is typically found on forms that collect a digital signature scan, a small avatar or thumbnail, or a supporting document where the portal was designed around very low bandwidth. Some older government portals in South Asia and Southeast Asia also impose this limit on applicant photos. It is an extremely tight target and usually results in a small-resolution output.
At 10KB, image quality is noticeably reduced compared to the original, but the image remains clear enough for identity verification and form submission purposes. A signature scan or small avatar typically survives compression to 10KB with acceptable clarity. For facial photographs, the tool will also reduce the image dimensions to meet the target, this is expected and common at 10KB, unlike looser targets where dimensions rarely change.
Usually a low one. The search is allowed to use any quality from 1 to 100, there's no artificial ceiling, but at a target this tight the highest quality that fits is often near the bottom of that range for anything beyond a simple, low-detail image. If even the lowest quality setting still overshoots 10KB, the tool starts reducing pixel dimensions instead, then searches quality again at the smaller size.
You can upload JPEG, PNG, WebP, AVIF, HEIC and HEIF files. The output is either JPEG or WebP only, never PNG. JPEG is recommended for submission portals because it has universal support across all systems and browsers.
No. Decoding uses the Canvas API, or a dedicated decoder for HEIC and HEIF files, and the compression itself runs via WebAssembly in a background Web Worker, so large images don't freeze the page. All of this happens inside your browser. Your image never leaves your device, you can disconnect from the internet after the page loads and the tool still works.
At 10KB, reducing encoder quality alone is often not enough for anything but a very simple source image. The tool first searches for the highest quality that fits within 10KB. If even the lowest quality setting produces a file that's visibly too degraded to be worth keeping, it tries progressively smaller dimensions, roughly 75%, 50%, 35%, 25% and then 15% of the original size, re-running the quality search at each step, until it finds a combination that both fits 10KB and clears a minimum acceptable quality. This two-stage approach gives the best possible visual output within the constraint.
This is rare but possible for an extremely detailed source image. If none of the dimension steps reach an acceptable quality within 10KB, the tool still delivers the best result it found across every attempt, the smallest, highest-quality version it could produce, and flags on the result panel that the exact target wasn't fully reached. Try a simpler or lower-resolution source image, or a slightly higher target like 20KB, if this happens.
Yes. The tool keeps the decoded image cached, so adjusting the target size field or clicking JPEG or WebP after a result already appears triggers an automatic recompress rather than asking you to drop the file in again. This is especially useful at 10KB, where bumping the target to 20KB or 50KB to compare results is common.
No. The quality search and any dimension-scaling attempts both run in a background Web Worker rather than on the page's main thread, so the tab stays responsive even while working through several attempts to reach a tight target like 10KB.
JPEG has no alpha channel, so a transparent PNG compressed with JPEG selected has its transparent areas filled with a solid color instead. This matters here more than on looser-target pages, since scanned signatures are sometimes saved as transparent PNGs. If the tool detects transparency and JPEG is selected, it shows a warning with a one-click button to switch to WebP, which keeps transparency intact.
No. The image is decoded to raw pixels and re-encoded during compression, so EXIF metadata, including GPS location and camera details, does not carry over to the compressed file.
No, this tool handles one image at a time. For a batch of files that all need to fit the same tight limit, run each one through individually.
No sign-up. No uploads. Drop your image above and download the compressed version in seconds.
