Image Tools for Sellers
Professional product photos sell faster. Use these free tools to edit and optimize your images for Japanese flea market apps.
How to Use the Image Tools
- 1
Upload Your Photo
Drag and drop or click to select a product photo from your device. JPG, PNG, and WebP formats are supported. The tool works entirely in your browser — your photos are never sent to our servers.
- 2
Choose the Right Tool
Select from Resize, Compress, Background Remover, or Watermark. Mercari recommends images of at least 640×640px. For file size, keep under 5MB for smooth uploads. Use the compressor if your photo is over 3MB.
- 3
Adjust & Preview
Use presets for common sizes (640×640, 800×800, 1000×1000) or set custom dimensions. For compression, a quality setting of 80% balances file size and visual quality well for product listings.
- 4
Download & Upload to Mercari
Download the processed image and upload it directly to your Mercari listing. Square photos (1:1 ratio) with a clean white background consistently get more views and sell faster according to Mercari's seller data.
Why Good Photos Matter on Mercari
Research from Mercari Japan shows that the first product photo determines purchase decisions for approximately 70% of buyers. Items with bright, clear, white-background photos receive significantly more clicks in search results. Using our image tools to optimize your photos is one of the fastest ways to increase your sell-through rate without lowering your price.
For Yahoo Auctions and Rakuma, the same principle applies: more photos (up to 10 on Mercari, 20 on Yahoo Auctions) showing multiple angles, close-ups of any wear or defects, and size references with a common object all contribute to higher conversion rates and fewer post-sale complaints.
Available Tools
Background Remover
Remove backgrounds from product photos with one click. Create clean, professional listings.
Image Resize
Resize images to platform-recommended dimensions. Optimize for Mercari, Yahoo Auctions, Rakuma.
Image Compress
Reduce file size while maintaining quality. Faster uploads, better performance.
Watermark
Add watermarks to protect your product photos from theft.
Product Photo Tips
📸 Lighting
Natural daylight near a window works best. Avoid harsh shadows and yellow indoor lighting.
🎯 Background
White or plain backgrounds help your item stand out. Use our background remover for professional results.
📱 Multiple Angles
Show front, back, sides, and close-ups of any defects. Buyers appreciate transparency.
📏 Size Reference
Include a common item (coin, ruler) for scale, especially for small items.
Image Tool FAQ
Are my photos stored on your server?
No. All image processing happens locally in your browser using the Canvas API. Your photos never leave your device and are not uploaded to any server. This makes the tool safe for processing photos of high-value items.
What image size does Mercari recommend?
Mercari Japan recommends a minimum of 640×640px for product photos. Square format (1:1 ratio) displays best in search results. Maximum file size is 10MB, but keeping photos under 5MB ensures fast upload. Our resize tool includes preset sizes for Mercari's recommended dimensions.
Can I use these tools for Yahoo Auctions listings?
Yes. Yahoo Auctions (ヤフオク) accepts JPG and PNG images up to 3MB each. The resize and compress tools work well for Yahoo Auctions image requirements. Yahoo Auctions allows up to 20 photos per listing, so taking multiple angles is recommended.