Social Media Padding Generator — Add Letterbox / Pillarbox to Any Image Free
Add padding, letterbox, or pillarbox to images for any social media aspect ratio — Instagram, Twitter, LinkedIn, TikTok, Pinterest. Set custom background colour. 100% browser-based, free.
Frequently Asked Questions
What is image padding and why do I need it for social media?
Image padding adds a solid-colour (or transparent) border around your image to fit a target aspect ratio without cropping or stretching. This is essential when your photo does not match the platform's required ratio — for example, fitting a landscape photo into Instagram's square or 4:5 feed without losing any content.
Which aspect ratios are supported?
Pre-built presets cover Instagram Feed (1:1 and 4:5), Instagram Story (9:16), Twitter/X post (16:9), LinkedIn post (1.91:1), Facebook ad (1:1), Pinterest pin (2:3), and YouTube thumbnail (16:9). A custom ratio mode is also available for any W:H combination.
Can I use a transparent background instead of a solid colour?
Yes. Set the background colour to fully transparent (select a colour with alpha=0 or type #00000000) and export as PNG. The padding area will be transparent in the output, giving you maximum flexibility when the image will be composited in a design tool.