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

Open a browser-based compressor like this site's Compress Image tool, choose the photo, enter the target KB and download the result. Cropping first gives better quality at small sizes.

Does taking a screenshot reduce photo size?

Usually yes, but screenshots are often PNG files with the wrong dimensions and extra borders, so they are a poor choice for form uploads.

How do I make my iPhone save photos as JPG?

Go to Settings, Camera, Formats and choose Most Compatible. New photos will be saved as JPEG instead of HEIC.

Is it safe to compress my photo on a website?

On this site the compression runs inside your browser and the photo is not uploaded. For any site, check whether it uploads files before using it with personal documents.

Why is my compressed photo still too big?

The dimensions are probably still large. Resize to the pixel size the form asks for first, then lower the quality.

How to reduce photo size in KB on your phone

Updated 11 October 2026

Reduce photo size in KB →

Most applicants now fill forms entirely on their phones. The problem: a phone camera photo is usually 2 to 5 MB, while forms often want 20 to 100 KB. That is a reduction of 20 to 100 times. Here are the practical ways to get there on Android and iPhone, and what each one costs you in quality.

Why phone photos are so large

A 12 megapixel camera produces an image around 3000 × 4000 pixels. A typical passport-style photo for a form needs something like 200 × 230 pixels, which is about 46,000 pixels in total instead of 12 million. So most of the size reduction comes from shrinking the dimensions, and the rest comes from JPEG compression.

Method 1: use this site in your phone browser (both Android and iPhone)

Open Compress Image in Chrome, Safari or any modern browser.
Tap to choose a photo from your gallery or take a new one.
Enter the target size in KB (for example 50) and, if your notice gives them, the pixel dimensions.
Check the preview and the output size shown, then tap Download.
Upload the downloaded file to your form.

The processing happens on your phone; the photo is not uploaded to our server. For common targets there are one-tap presets: 20 KB, 50 KB, 100 KB and 200 KB. If the form gives a size in cm, use Resize Photo instead.

Method 2: built-in options on iPhone

Shoot in JPEG: go to Settings > Camera > Formats and choose Most Compatible. New photos are saved as JPEG instead of HEIC, which many portals do not accept. This does not make files smaller (HEIC is actually more compact), but it avoids format errors. See our HEIC guide.
Crop in Photos: open the photo, tap Edit, then the crop tool. Cropping to just your head and shoulders removes many pixels and reduces size noticeably.
Mail size option: when you attach photos in the Mail app, iOS has offered Small, Medium, Large and Actual Size choices. This works but you do not control the exact KB.

Method 3: built-in options on Android

Gallery resize: some gallery apps, for example on Samsung phones, include a Resize option in the edit or more menu. Choose a smaller percentage and save a copy.
Crop: Google Photos and most gallery apps let you crop and save a copy, which cuts the pixel count.
Lower camera resolution: in the camera settings you can choose a lower picture size before shooting. Useful if you are taking a fresh photo only for a form.

None of these give you an exact KB target, so you may need to check the size afterwards and repeat.

The screenshot trick, and why to avoid it

A common tip is to open the photo, take a screenshot, and upload the screenshot. It does make a smaller file, but:

Screenshots on most phones are saved as PNG, which many forms reject and which can be larger than a JPEG for photos.
The screenshot includes status bars, buttons or black borders unless you crop carefully.
The size in pixels matches your screen (for example 1080 × 2400), not what the form asks for.
Quality drops because the image has been scaled for display and captured again.

Similarly, sending a photo to yourself on WhatsApp compresses it, but you cannot control the result, and some versions strip the file name and date.

Worked example

Riya has a 3.2 MB photo (3024 × 4032 px) and the form asks for 200 × 230 px, 20 to 50 KB, JPG.

Step	Result
Original	3024 × 4032 px, about 3.2 MB
Crop to head and shoulders in the 200:230 shape	about 2000 × 2300 px, roughly 1.5 MB
Resize to 200 × 230 px at high quality	typically 25 to 45 KB
Fine-tune quality so the file is about 40 KB	inside the 20 to 50 KB range with margin

The figures are typical; a busy background or a noisy low-light photo will be larger.

Quick checklist before uploading

Format is JPG/JPEG unless the notice says otherwise.
Size is a little inside the limits, not right on the edge (see KB explained).
Dimensions match the notice.
Face is clear and not stretched.

Questions people ask

How do I reduce photo size from MB to KB on my phone?: Open a browser-based compressor like this site's Compress Image tool, choose the photo, enter the target KB and download the result. Cropping first gives better quality at small sizes.
Does taking a screenshot reduce photo size?: Usually yes, but screenshots are often PNG files with the wrong dimensions and extra borders, so they are a poor choice for form uploads.
How do I make my iPhone save photos as JPG?: Go to Settings, Camera, Formats and choose Most Compatible. New photos will be saved as JPEG instead of HEIC.
Is it safe to compress my photo on a website?: On this site the compression runs inside your browser and the photo is not uploaded. For any site, check whether it uploads files before using it with personal documents.
Why is my compressed photo still too big?: The dimensions are probably still large. Resize to the pixel size the form asks for first, then lower the quality.