How do I compress an image to 300KB?

Upload your photo and the tool auto-targets 300KB by lowering quality just enough to fit. You can fine-tune the slider afterwards; the live size readout shows when you are 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.

Processed output — A detailed photo and its 300KB version, which looks the same, with both file sizes shown.

Source — 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 still fits under 300 kilobytes, so your image stays as sharp as possible while meeting 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

Compress to 300KB

Target loaded automatically

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.

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 fits the 300KB goal.
Output setup: JPEG selected for size efficiency; Quality remains adjustable, and another supported output format can still be chosen before processing.
Review rule: Confirm the result is at or below 300KB; Compare the preview, dimensions, and measured output size 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 auto-targets 300KB by lowering quality just enough to fit. You can fine-tune the slider afterwards; the live size readout shows when you are 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 you can do with Image Compressor

Review the main capabilities before you begin.

Compress JPG, PNG and WebP to an exact KB size
Hit a target like 20KB, 50KB or 100KB
Shrink images without losing visible quality
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)

Open this tool

Compress to a specific size

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Free to use · No signup required · Without watermarkUploads are encrypted in transitRemoved under our retention policy

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Official Documents

Hit Exact KB Limits for Govt & Exam Portals

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Batch-Ready MLS & Listing Photo Packs

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Resume & Job-Application Photo Sizing

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Course & LMS Assignment Upload Limits

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Batch-Optimize a Website's Entire Image Library for Core Web Vitals

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