How-to Guide 2 min read

How to Reduce PDF File Size to Under 1MB

Many online application forms, job portals, and email systems require PDFs under 1MB. A resume with a photo, a scanned form, or a brochure PDF can easily be 5–20MB out of the box. Getting it under 1MB without destroying readability is achievable in almost every case. This guide shows exactly how.

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By ImgToolkit Team · Updated May 2026 · 2 min read · Processed in your browser

PNGJPGWebPGIF

Quick Answer

Many online application forms, job portals, and email systems require PDFs under 1MB. A resume with a photo, a scanned form, or a brochure PDF can easily be 5–20MB out of the box.

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Compress PDF to Under 1MB

Step-by-Step Guide

4 steps · takes under 1 minute

Check the current file size

Right-click the PDF and select Properties (Windows) or Get Info (Mac) to see the current size.

Apply standard compression first

Use the Compress PDF tool with standard settings. This alone usually reduces most PDFs by 50–70%.

Check the resulting size

If still over 1MB, apply high compression to bring images down to 72 DPI.

If it's a scanned PDF, consider resaving

Scanned PDFs (photos of paper) compress differently. Try scanning at 150 DPI instead of 300 DPI at the source for dramatically smaller files.

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Pro tip

Use 75–85% quality for web images — you get 60–80% smaller files with no visible difference at normal screen sizes.

Format & File Size Comparison

Same 1080×1080px photo processed four ways

Format	Quality	File Size	Notes
PNG (original)	Perfect	4.2 MB	No compression — too large for web
Compressed PNG	Visually identical	1.1 MB	−74% — transparency preserved
JPG (85% quality)	Excellent	310 KB	−93% · Best for photos
WebP (85%)BEST	Excellent	205 KB	−95% · Recommended for web

Based on a 1080×1080px photo. Results vary by image content and complexity.

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Frequently Asked Questions

3 questions answered

What's the easiest way to get a PDF under 1MB?

Use Compress PDF with high compression mode. For most PDFs with images, this alone achieves 1MB or under. If the PDF is text-only, it's almost certainly already under 1MB.

Can I compress a 50MB PDF to under 1MB?

Usually yes, if the PDF contains images. Image compression at 72 DPI can reduce a 50MB image-heavy PDF to 1–3MB. Getting below 1MB from 50MB requires the content to be reducible — scanned documents at very high DPI can typically be brought this low.

Will text still be readable after aggressive compression?

Text in PDFs is not affected by image compression — it remains perfectly sharp regardless of compression settings. Only embedded images are affected.

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Compress PDF to Under 1MB

Compress PDF

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Compress PDF to Under 1MB

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Your images are processed entirely in your browser using WebAssembly. No files are ever uploaded to a server.

What's included

Standard and high compression modes