Image Size Targets: Exact KB for Every Upload

Quick answer: match the image to the destination before uploading — 20-50KB for ID systems, 100-500KB for forms and listings, ~1080px pre-compressed files for social apps. Hitting the target yourself beats letting each platform crush a 5MB original.

Every common image target, in one table

Destination	Target	Hit it with
Strict ID / passport systems	20 KB	Compress to 20KB
Visa / exam photo portals	30-50 KB JPEG	30KB photos · 50KB JPEG
General forms, profiles	100 KB	PNG to 100KB
Listings, CMS uploads	500 KB	Compress to 500KB
WhatsApp sharing	A few hundred KB	Photos for WhatsApp
Instagram posts	1080px, lean file	Images for Instagram
Resale listings	Fast, detailed photos	Photos for Vinted

Why platforms punish oversized uploads

Every platform recompresses what you send — Instagram, WhatsApp, and marketplaces all run your file through their own crusher. The bigger your upload, the harder their pass, and the blurrier the result. A pre-compressed file in the platform's preferred dimensions gives their algorithm almost nothing left to destroy.

Hit any target in 3 steps

1. Open the free image compressor — JPG, PNG, and WebP all supported, all in your browser.
2. Move the quality slider until the live size preview matches your destination target.
3. Download and upload. If a portal still rejects it, step down one quality notch and retry.

When the target seems impossible

• Shrink dimensions first: a 4000px photo cannot reach 20KB — resize to the display size, then compress.
• Match format to content: flat graphics compress far smaller as PNG/WebP; photographs belong in JPG.
• Check transparency needs: JPG has none — logos needing clear backgrounds must stay PNG or WebP even at higher weights.