X image size guide
Quick reference for all X image sizes — header, profile, tweet image, card sizes.
Profile photo
400×400px
Displays as circle, 48px in feed
Header / banner
1500×500px
3:1 ratio
Single image tweet
1200×675px
16:9 — best for landscape
2-image tweet
1200×900px each
Shows side by side
Card image (link)
1200×628px
Set via OG meta tags
about this tool
The X image size guide is free to use — no sign-up required. Quick reference for all X image sizes — header, profile, tweet image, card sizes.This tool is part of PostAI's free toolset for social media creators, marketers, and teams.
Looking for more than a standalone tool? PostAI's full platform lets you schedule to 11 platforms, generate AI-written content in your voice, discover viral posts, and grow on X and LinkedIn — starting at $9/mo.
want to schedule and post, not just format?
PostAI schedules to 11 platforms, includes AI content generation, and starts at $9/mo.
start free — no credit cardrelated tools
X (Twitter) character counter
Count characters in your tweet with real-time feedback. Supports threads and media character deductions.
Thread splitter
Paste long text and automatically split it into a numbered tweet thread at natural break points.
Tweet → LinkedIn converter
Reformat a tweet or thread into a LinkedIn post with proper formatting and expanded context.
X bio generator
Generate 5 punchy X bios from your role, skills, and personality. 160 char limit enforced.
Viral hook generator (X)
Generate 10 high-engagement tweet opening lines for any topic using proven viral frameworks.
Tweet engagement rate calculator
Calculate your engagement rate from likes, replies, reposts, and impressions.