What quality setting should I use to compress to under 4MB?

Start at quality 87 for most images. A typical 12MP smartphone photo compresses to 1.5–3MB at quality 87. For very large files from professional cameras (20MP+), try quality 83. The download button shows the exact output size so you can adjust before saving.

Why do I need to compress an image to 4MB?

Several platforms and email systems set a 4MB limit for photo attachments and uploads. Some property listing platforms, media submission portals, and content management systems enforce this threshold. Modern cameras from Canon, Nikon, and Sony produce RAW files of 20–50MB and full-quality JPEGs of 8–20MB that exceed this limit.

How do I compress a 10MB photo to under 4MB?

Upload the photo and set quality to 87. A 10MB JPEG typically compresses to 2.5–4MB at quality 87. If still above 4MB, lower quality to 83, or use the Resize Image tool to reduce dimensions first — halving width and height removes 75% of pixel data before compression.

Will compressing to 4MB reduce visible quality?

No. Quality 87 is well above the threshold where compression artifacts become visible. Photos compressed at quality 87 look identical to originals at normal viewing distances and screen sizes. Quality differences only become apparent below quality 70 when examining images at 200%+ zoom.

Can I compress a PNG to under 4MB?

Yes. This tool converts PNG to compressed JPEG, which typically reduces a 10–20MB PNG to 1–4MB at quality 87. If you need to preserve PNG transparency, use the Resize Image tool to reduce dimensions instead.

Are my images safe when using this tool?

Yes. All compression runs entirely in your browser — no image is ever sent to a server. Your photos never leave your device during processing.

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Quality87%

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When Do You Need to Compress to 4MB?

The 4MB limit appears on several file sharing platforms, email attachment systems, and media portals. Some property listing websites and real estate management systems cap individual photo uploads at 4MB for older portal software. Certain CMS platforms and document management systems set 4MB as the default file upload limit. Email services that accept large attachments still recommend keeping individual photo attachments under 4MB for reliable delivery across all recipient email systems.

Modern cameras make this limit surprisingly difficult to hit with high-quality JPEGs. A 24MP mirrorless camera shooting at maximum JPEG quality produces files of 12–25MB. A full-frame 45MP camera can produce JPEGs of 20–40MB. Compressing at quality 87 brings most photos from professional cameras to 2–4MB — within the target while retaining sharpness and color accuracy suitable for professional presentation.

Quality Settings for a 4MB Target

The table below shows expected output sizes at different quality settings for common image resolutions. Quality 87 is the recommended starting point for the 4MB target.

Image dimensions	Quality 90	Quality 87	Quality 83
1920×1080px	500KB–1.5MB	400KB–1.2MB	300KB–900KB
3000×2000px (12MP)	1.5–4MB	1.2–3MB	800KB–2.5MB
4000×3000px (12MP)	2–6MB	1.5–4MB	1–3MB
6000×4000px (24MP)	5–12MB	3.5–8MB	2.5–6MB
8000×5333px (43MP)	10–20MB	7–14MB	5–10MB

Images up to 12MP reliably reach the 4MB target at quality 87. For 24MP+ files, try quality 83, or use the Resize Image tool to reduce dimensions first. A 6000×4000px image resized to 3000×2000px is 75% smaller before any compression is applied.

Common Use Cases for the 4MB Limit

Email with photos

Many corporate email systems and spam filters flag emails with large individual attachments. Keeping each photo under 4MB ensures reliable delivery through gateway filters and avoids triggering recipient-side size limits. A 20-photo selection from a mirrorless camera at full quality would be 200–400MB — compressing each to under 4MB brings the total to 40–80MB, more practical for attachment-based sharing.

Real estate and property portal uploads

Legacy property listing software and older MLS systems often enforce 4MB per-image limits. Real estate agents shooting with full-frame cameras produce JPEGs of 15–25MB per shot. Compressing to 4MB or under at quality 87 retains the sharpness and tonal range that property buyers expect while meeting the upload constraints of regional listing platforms.

Document management systems

Corporate document management platforms (SharePoint on older configurations, many legal DMS tools) enforce per-file size limits. Scanned documents, floor plans, and architectural drawings exported as high-resolution JPEGs often exceed 4MB. Compressing at quality 87 brings most scans into the acceptable range.

Stock photo initial submissions

Some stock photography agencies and editorial platforms require initial review submissions under 4MB. Higher-resolution finals are submitted separately once accepted. Compressing at quality 87 retains sufficient detail for editorial review at typical display sizes while meeting the initial submission file size requirement.

Platforms with 4MB or Similar Limits

Platform / System	Limit	Notes
Gmail inline image	5MB	Recommends under 4MB for reliable inline display
Outlook attachment (preview)	4–10MB	Varies by organization IT policy
WhatsApp (original quality)	16MB	Below 4MB loads fast on all connections
Instagram (original)	8MB	Quality 87 keeps most photos well under limit
Discord nitro upload	500MB	No practical limit for photos
Imgur upload	20MB	Compresses above 5MB automatically
Squarespace image upload	3MB	Recommended max — compress to 3MB or under

Other Size Targets

Compress to 3MB

CMS and portfolio platforms

Compress to 5MB

Email and messaging apps

Compress to 2MB

Government portals and ID uploads

Compress to 1MB

Social media and web uploads

Compress to 500KB

Strict web and CMS uploads

Compress to 10MB

Discord and email attachments