Free 420x645 Image Converter
Resize images to a 420x645 portrait format for vertical cards, flyers, and mobile previews
Upload Your Image
Drag & drop or click to select your image (Max 20MB)
Supports JPG, PNG, GIF, WEBP formats
Why Choose 420x645?
Perfect dimensions for your specific needs with professional results
Slim Portrait Ratio
420x645 creates a slim portrait frame for vertical cards, cover images, and tall product shots without feeling cramped on mobile screens or card stacks.
Poster and Flyer Proofs
Useful for mini posters and event flyers where you want a tall layout preview before exporting larger files for final print or campaigns and approvals.
Editorial Card Layouts
Great for article cards and catalog tiles, showing more subject height while leaving space for headlines and metadata in content feeds without crowding copy.
Smart Vertical Cropping
Smart crop keeps faces and key objects centered in a tall frame, avoiding clipped heads or feet when resizing from landscape originals and mixed aspect shots.
Mobile Preview Balance
Optimized for mobile previews and scrolling lists, giving a strong vertical presence without oversized files or slow loading in feeds and newsletters.
Consistent Portrait Grid
Keep portrait tiles aligned across pages so vertical grids look tidy and professional in galleries, listings, and newsletters across seasonal updates.
Frequently Asked Questions
Everything you need to know about resizing images to 420x645
420x645 works well for vertical cards, flyer previews, book or album covers, and mobile tiles. It gives a taller feel than square images and shows more subject height in compact layouts. It is also handy for slim mockups.
It is a custom portrait ratio, close to 2:3 but slightly taller. Use it when you control the layout and want a consistent slim card without relying on standard photo sizes or camera presets. If you need a classic print ratio, use 2:3.
Compared with 400x600, 420x645 is a bit taller and slimmer. Versus 480x640, it is narrower and lighter. Choose based on the card shape your layout expects and to avoid extra cropping in components. Match it to your card template.
Use smart crop to keep the subject centered, or add top and bottom padding if you need full content. Avoid stretching so faces and text stay natural and readable, then check top and bottom safe areas for headlines and badges.
At 300 DPI, 420x645 prints about 1.4 x 2.15 inches. It is good for small proofs or mockups; larger prints need higher resolution sources to keep edges sharp and gradients smooth. Use 600x900 or higher for real prints.
JPEG is best for photos, PNG for graphics or text overlays, and WebP for smaller web files. Pick the format that matches your transparency and sharpness needs, especially for headlines and badges. PNG or WebP with alpha works for overlays.
File size is usually modest. Optimized JPEG or WebP files often stay small, while PNG can be heavier if you include transparency or lots of text detail, so compress with care and test readability. Batch compression helps when you host many cards.
Upscaling is possible but detail is limited by the source. For best results start with a larger image, then downscale to 420x645 for clean edges and smoother gradients in print proofs. Avoid enlarging low resolution screenshots.
Yes, our image resizing tool is completely free to use. No registration required, no watermarks, and no hidden fees. Simply upload your image and resize it to your desired dimensions.
Absolutely! All image processing is done locally in your browser. Your images are never uploaded to our servers, ensuring complete privacy and security of your files.
Popular resize presets
Jump to the most commonly used image sizes for your projects