Free Mass Image Resizer
Bulk resize up to 50 images at once with KDP cover and social media presets. Download individually or grab everything as a ZIP — all in your browser.
Images & Output Size
Resized images will appear here with individual download links and a bulk ZIP option.
All resizing happens locally in your browser — nothing is uploaded to any server. "Crop to Fill" keeps proportions and crops overflow; "Fit Inside" letterboxes the image; "Stretch" distorts to exact dimensions.
Got Your Interior? Design the Matching Cover Next
Amazon KDP requires an exact wrap-around cover with dynamic spine thickness and 0.125" bleed margins. Complete your book now:
Automated KDP Cover Creator
Auto-calculates spine width from page count, paper type, and bleed so your cover passes Amazon print check.
Amazon Print Cost & Royalty Calculator
Verify your manufacturing print cost and discover your minimum retail list price to maximize 60% royalties.
KDP Description HTML Formatter
Format approved Amazon HTML (<h2>, <b>, <ul>) with character counters and live Amazon product page mockup.
Frequently Asked Questions
Are my photos uploaded to a server?
No — every resize happens locally using your browser's canvas; nothing is sent anywhere, which is also why there's no file-count limit.
What's the difference between Crop to Fill and Fit Inside?
Crop to Fill scales the image to cover the full target size and crops any overflow; Fit Inside scales the image to fit entirely within the size, adding letterboxing if the aspect ratios differ.
What size should I use for a KDP eBook cover?
1600×2560px is Amazon's standard recommended Kindle cover size — it's included as a one-click preset.