How do I compress an image to 300KB?

Upload your photo and the tool works toward 300KB by lowering quality just enough to fit. The quality slider is locked while a target is set (clear the target to use it), and the size appears on the result screen, so check that it is under 300KB.

Will compressing to 300KB reduce quality?

We keep the highest quality that still fits 300KB. For typical photos 300KB keeps good detail; very large originals may soften slightly, which is expected at this size.

What formats can I compress to 300KB?

JPG, PNG, WebP and GIF inputs are supported. JPEG output usually reaches 300KB with the best quality-to-size balance.

Is the 300KB compressor free and private?

Yes. It is free to use, and uploads are processed on secure servers and auto-deleted after processing.

What does 300 KB photo size mean?

It is a limit on how much the file weighs, not on how many pixels wide the photo is. A form may state both, and they are separate rules. Set the width and height first with Image Resizer, then compress here to 300 KB, and check the size on the result screen before you upload.

How many pixels can a 300 KB photo have?

Around 1,500 to 1,600 pixels across fits 300 KB at high quality, and about 2,000 still fits at moderate quality. A camera photo of 4,000 pixels or more has to be squeezed hard, which is where text blurs, so cut the width first. Busy scenes need more bytes than plain ones.

How many 300 KB photos fit in a 2 MB limit?

Six. A 2 MB limit is 2,048 KB, and six files of 300 KB make 1,800 KB, while a seventh would take it to 2,100 KB. If a form caps the total rather than each file, divide the limit by the number of photos and enter that figure as the target.

Should I use JPG or PNG for a 300 KB document photo?

Use JPG. A photographed page is a picture of paper and shadows, which JPEG handles well, and this page is set to JPEG output. PNG output tends to reach the target by narrowing the picture, which makes the text smaller and harder to read.

What is a 300KB photo size in JPG, and how many MB is it?

A 300KB JPG weighs about 0.29 MB, because 1 MB is 1,024 KB here. The weight is the same whether the picture is a portrait or a page, but the pixels it holds differ. If a limit is written in MB, multiply it by 1,024 to get the KB number to type into Target file size (KB).

How do I compress a JPG to 300KB?

Upload the JPG with the target at 300 and Output Format on JPEG, then select See result. The download is a JPG aimed at 300 KB or smaller, and the result screen shows its real size. A photo of a page from a phone camera has far more pixels than 300 KB needs, so cut the width to about 1,500 pixels first for crisper text.

What does JPG 300 KB mean for a document photo?

It means the file is a JPG or JPEG and weighs 300 KB or less. For a photographed page, the weight is the easy part and readability is the hard one. Size the picture first, compress last, and read the smallest line at full size before you upload.

How do I make a photo under 300KB?

Keep the target at 300 and check the size on the result screen. This page counts 1 KB as 1,024 bytes, so 300 KB allows up to 307,200 bytes. A site that counts 1,000 bytes per KB allows 300,000, so enter 290 if a file near the limit is refused.

Can I compress several document photos to 300 KB at once?

Yes, with Premium batch mode. Add the photos, keep the target at 300, and every one is compressed on its own and returned in a single ZIP. Photos of dense pages end closer to 300 KB than photos of plain ones, so open a few at full size before you send the set.

Can I convert a PNG screenshot to a 300KB JPG?

Yes. This works as a 300KB JPG converter: upload the PNG, leave Output Format on JPEG and select See result, and the download is a JPG. JPEG softens thin lines and small print more than PNG does, so crop the screenshot to the part that matters and read the result at full size before you send it.

Compress Image to 300KB — image compressor to reduce photo file size to a target KB — Processed output — A detailed photo and its 300KB version, which looks the same, with both file sizes shown.

Image Optimization

Compress Image to 300KB

Compress to 300KB

Target loaded automatically

Reduce any JPG, PNG or WebP photo to 300KB online for free. The compressor automatically searches for the highest quality that gets closest to 300 kilobytes, so your image stays as sharp as possible for the 300KB upload limit. Files are processed on secure servers and auto-deleted afterwards.

Forms and portals capped at 300KB
Email or message attachments near a 300KB limit
Smaller web images with a measured size result

Drop an image — set your target KB and get a smaller file that still looks sharp

Upload an image

Drop a file here, or click to browse

Supported formats include JPG, PNG, GIF, WebP, SVG, HEIC, AVIF, TIFF, RAW, PSD. Maximum file size: 20 MB.

Compressing document photos and scans to 300 KB

When a portal asks for a photo of a receipt, certificate or letter under 300 KB, readability is the only thing that matters. Photograph the page flat, filling the frame, in even light without your own shadow across it, and crop away the table around the page so no bytes are spent on the background.

The target is preset to 300 KB with JPG output. The compressor lowers quality first and narrows the image only when it must, so a cropped page often keeps its full width. Then view it at actual size and read the smallest line: totals, dates and reference numbers should be clear, and colored stamps or signatures should still be distinguishable.

If the portal wants a PDF rather than an image, combine the page photos into one PDF, and if that PDF is over the limit, reduce the PDF size with a preset. For a stack of receipts, Premium batch mode compresses every photo to the same target.

Compress image to 300KB without blurring a photo or page scan

This image compressor to 300KB shrinks a photo, a scan or a picture of a document toward 300 KB and saves it as a JPG. A 300 KB photo size is a comfortable budget for a person or an object at a moderate pixel size, so the real question is usually how to keep the text on a photographed page readable. Upload the file, run it once, and check the smallest line at full size.

Shrink the pixels first so 300 KB can hold a sharp page

A photo of a page straight from a phone camera has far more pixels than a 300 KB file can carry. The compressor copes by dropping quality to its lowest levels, and the first thing to blur is the text. Bring the width to roughly 1,500 or 1,600 pixels before compressing, and 300 KB holds that picture at much higher quality, so the letters stay cleaner.

Why text can look fuzzy even when the size fits

A result under 300 KB can still be hard to read if the photo was soft, tilted or shadowed to begin with, because compression cannot restore what the camera missed. A very large original is the other cause: with so many pixels to fit, quality sinks and halos appear around each letter. If you see either, retake or crop the photo, bring the width down, and run it again from that file.

Scan a paper document instead of photographing it

When the document is on paper and the portal accepts a PDF, scan the pages straight into a PDF. That tool finds the page edges, straightens each page, offers a Scan mode such as B&W or Grayscale, and has a Quality slider that trades detail for a smaller file. It produces a PDF, not a JPG, so use it only when the portal asks for that type.

Resize an image to 300KB: file weight first, then pixels

Asking to resize an image to 300KB can mean two different things. If the form wants the file to weigh 300 KB, the Target file size (KB) field is the setting that does it. A width and height are a separate rule and belong to Image Resizer. When a form states both, set the pixels first and compress last, because the compressor can narrow a picture by itself when quality alone cannot reach 300 KB.

When 300 KB is not the right number

A portal with a tighter cap is better served by a 200 KB target, and one with more room keeps finer print at 500 KB. Use the figure the portal states, and confirm it on the result screen before you upload.

Before you upload

Read the smallest line of text at full size; if you have to squint, cut the width and run it again.
Compare the size on the result screen with the portal's limit, since that is the file you will download.
Keep the sharp original; the compressed copy is only for the upload.
Leave Output Format on JPEG for a photographed page unless the portal names another type.

Image OptimizationPreset loaded automatically

Set up for Compress Image to 300KB

Explore Image Optimization

Prepared settings

Starting point: One JPG, PNG, WebP, or GIF image; Upload is the only required setup step; the page opens with the target already active.
Prepared target: 300KB file-size goal; The compressor searches for the highest usable quality that gets closest to the 300KB goal.
Output setup: JPEG selected for size efficiency; The quality slider is locked while the target is active (clear the target to use it), and another supported output format can still be chosen before processing.
Review rule: Confirm the result is at or below 300KB; The preview shows quality only; check the size on the result screen, and the dimensions, before using the file in a strict upload form.

Best-fit uses

Forms and portals capped at 300KB
Email or message attachments near a 300KB limit
Smaller web images with a measured size result

Frequently asked questions

How do I compress an image to 300KB?: Upload your photo and the tool works toward 300KB by lowering quality just enough to fit. The quality slider is locked while a target is set (clear the target to use it), and the size appears on the result screen, so check that it is under 300KB.
Will compressing to 300KB reduce quality?: We keep the highest quality that still fits 300KB. For typical photos 300KB keeps good detail; very large originals may soften slightly, which is expected at this size.
What formats can I compress to 300KB?: JPG, PNG, WebP and GIF inputs are supported. JPEG output usually reaches 300KB with the best quality-to-size balance.
Is the 300KB compressor free and private?: Yes. It is free to use, and uploads are processed on secure servers and auto-deleted after processing.
What does 300 KB photo size mean?: It is a limit on how much the file weighs, not on how many pixels wide the photo is. A form may state both, and they are separate rules. Set the width and height first with Image Resizer, then compress here to 300 KB, and check the size on the result screen before you upload.
How many pixels can a 300 KB photo have?: Around 1,500 to 1,600 pixels across fits 300 KB at high quality, and about 2,000 still fits at moderate quality. A camera photo of 4,000 pixels or more has to be squeezed hard, which is where text blurs, so cut the width first. Busy scenes need more bytes than plain ones.
How many 300 KB photos fit in a 2 MB limit?: Six. A 2 MB limit is 2,048 KB, and six files of 300 KB make 1,800 KB, while a seventh would take it to 2,100 KB. If a form caps the total rather than each file, divide the limit by the number of photos and enter that figure as the target.
Should I use JPG or PNG for a 300 KB document photo?: Use JPG. A photographed page is a picture of paper and shadows, which JPEG handles well, and this page is set to JPEG output. PNG output tends to reach the target by narrowing the picture, which makes the text smaller and harder to read.
What is a 300KB photo size in JPG, and how many MB is it?: A 300KB JPG weighs about 0.29 MB, because 1 MB is 1,024 KB here. The weight is the same whether the picture is a portrait or a page, but the pixels it holds differ. If a limit is written in MB, multiply it by 1,024 to get the KB number to type into Target file size (KB).
How do I compress a JPG to 300KB?: Upload the JPG with the target at 300 and Output Format on JPEG, then select See result. The download is a JPG aimed at 300 KB or smaller, and the result screen shows its real size. A photo of a page from a phone camera has far more pixels than 300 KB needs, so cut the width to about 1,500 pixels first for crisper text.
What does JPG 300 KB mean for a document photo?: It means the file is a JPG or JPEG and weighs 300 KB or less. For a photographed page, the weight is the easy part and readability is the hard one. Size the picture first, compress last, and read the smallest line at full size before you upload.
How do I make a photo under 300KB?: Keep the target at 300 and check the size on the result screen. This page counts 1 KB as 1,024 bytes, so 300 KB allows up to 307,200 bytes. A site that counts 1,000 bytes per KB allows 300,000, so enter 290 if a file near the limit is refused.
Can I compress several document photos to 300 KB at once?: Yes, with Premium batch mode. Add the photos, keep the target at 300, and every one is compressed on its own and returned in a single ZIP. Photos of dense pages end closer to 300 KB than photos of plain ones, so open a few at full size before you send the set.
Can I convert a PNG screenshot to a 300KB JPG?: Yes. This works as a 300KB JPG converter: upload the PNG, leave Output Format on JPEG and select See result, and the download is a JPG. JPEG softens thin lines and small print more than PNG does, so crop the screenshot to the part that matters and read the result at full size before you send it.

What you can do with Image Compressor

Review the main capabilities before you begin.

Compress JPG, PNG and WebP toward a target KB size
Aim for a target like 20KB, 50KB or 100KB
Compare the quality before you download
Meet upload limits for forms and portals
Speed up your website with lighter images
Bulk-compress many photos at once

Use this tool

Settings reference

Available controls for Image Compressor.

Mode

Single image / BatchPresets: Switches between compressing one photo with a live preview and queueing many images to compress with the same settings and download together as a ZIP; batch mode is a Premium feature.Options: Single imageBatch

Quality

Target file size (KB)Number input: Optional size budget in kilobytes (minimum 1, e.g. 100) that, when set, adjusts quality automatically — reducing dimensions if needed — to fit the budget and disables the quality slider.
QualitySliderRange: 10–100% · Default: 30%: Controls how strongly the image is compressed — drag toward 10% for a smaller file or toward 100% for better quality — and is ignored while a target file size is active.
Quick PresetsPresets: One-tap starting points that jump the quality slider to a named level, from High Compression at 30% to High Quality at 90%, so you can pick by name and fine-tune afterwards.Options: High Compression (30%)Medium (50%)Balanced (70%)High Quality (90%)

Format

Output FormatDropdown: Chooses the saved file type — JPEG suits photos, WebP gives the smallest files, PNG keeps transparency, GIF keeps animation — defaulting to JPEG, or GIF when a GIF is uploaded.Options: JPEG (Best for photos)WebP (Smallest size)PNG (Transparency support)GIF (Animation support)

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Compress to a specific size

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