What is the best image size for a Twitter post?

1200×675px (16:9 ratio). This displays at full width in the Twitter / X feed without cropping. Twitter also accepts 1:1 square (1200×1200) and portrait (1080×1350) images.

What is the Twitter header size?

1500×500px. Twitter crops the header differently on desktop and mobile — keep important content in the center 1500×360px area to ensure it remains visible on all devices.

What size is a Twitter profile picture?

Twitter profile pictures display at 400×400px in the profile view and as small as 48×48px next to tweets. Upload at 400×400px — Twitter crops it to a circle.

Can I use a HEIC photo on Twitter?

Twitter does not accept HEIC files. Upload your HEIC photo here — it is automatically converted to JPEG and resized to your chosen Twitter dimensions in one step.

Is this Twitter image resizer free?

Yes, completely free. No sign-up, no watermark, no usage limits. All processing happens in your browser — your photos never leave your device.

Resize Image for Twitter / X

Select your format, upload your photo — resized instantly to exact Twitter dimensions

Select format:

Drop image here or click to upload

JPG, PNG, WebP, HEIC — max 20MB

You can also paste an image (Ctrl+V)

⚡ Resized instantly·🔒 Files never leave your device·✓ Free, no sign-up

Official Twitter / X Image Size Requirements

Twitter (now rebranded as X) displays images across the feed, profile, and link previews at different dimensions. Uploading at the correct pixel dimensions prevents Twitter from resampling your image and adding compression artifacts. Here are the exact specifications for every Twitter image type:

Image type	Dimensions	Ratio	Notes
Post Image (single)	1200×675px	16:9	Displays full-width in feed
Post Image (2 images)	1200×675px each	16:9	Twitter crops to 1:1 in preview
Header / Banner	1500×500px	3:1	Cropped differently on mobile
Profile Picture	400×400px	1:1	Cropped to circle by Twitter
Twitter Card (link)	1200×628px	1.91:1	og:image for link previews
In-stream Photo (max)	5120×4096px	Any	Max upload size, shown cropped in feed

Twitter accepts JPG, PNG, GIF, and WebP. Maximum file size is 5MB for photos and 15MB for GIFs. Images wider than 1280px are downscaled by Twitter.

How to Resize an Image for Twitter — 3 Steps

1
Select your Twitter image type
Choose the format at the top — Post Image (1200×675), Header (1500×500), Profile Picture (400×400), or Twitter Card (1200×628). Post Image is the best default for tweet photos — it displays at full width in the feed.
2
Upload your image
Click the upload area or drag and drop your JPG, PNG, WebP, or HEIC file. HEIC photos from iPhone are automatically converted to JPEG. Processing starts immediately.
3
Download and post to Twitter / X
Download the resized image and attach it to your tweet, or upload it as your profile picture or header. The dimensions match what Twitter expects — no further cropping occurs.

Twitter Post Image Ratios — Which Displays Best

Twitter supports multiple aspect ratios for post images, but they display differently in the feed. The ratio you choose affects how much vertical space your tweet takes up — and therefore how much attention it receives.

1200×675px — 16:9

Optimal

Displays at full width. Maximum visual real estate in the feed. Best for photos, screenshots, and graphics.

1200×1200px — 1:1

Good

Square format. Slightly more compact than 16:9 but works well for product shots and illustrations.

1080×1350px — 4:5

Cropped

Twitter crops portrait images to 16:9 in the feed preview. The full image is visible after clicking.

Twitter Header — Safe Zone Guide

The Twitter header (1500×500px) is your profile's most visible branding asset. It displays differently on desktop and mobile, and your profile picture circle overlaps the bottom-left corner. Understanding these overlaps prevents important content from being obscured.

→Bottom-left is covered by profile picture. Your profile circle overlaps the bottom-left roughly 200×200px. Keep logos and text away from the bottom-left corner.
→Mobile crops the sides. On mobile, Twitter shows a taller crop of the header, cutting the left and right edges. Keep important content horizontally centered.
→Safe zone: center 1260×420px. Content within this area is visible on both desktop and mobile, clear of the profile picture overlap.

Does Twitter Compress Images?

Yes. Twitter converts all uploaded images to JPEG or WebP depending on the viewer's browser, applying its own compression. The compression is noticeable on images with fine text or gradients. To minimize quality loss:

→Upload PNG for graphics with text. Twitter serves PNG images to browsers that support it, preserving sharp text better than JPEG. For photos, JPEG is fine.
→Keep file size under 5MB. Twitter rejects images over 5MB. A 1200×675 JPEG at quality 90 is typically 150–350KB — well within the limit.
→Upload at 1200×675px for post images. Twitter resamples images outside the expected ratio, adding a second compression pass. Exact dimensions skip the resampling step.

Twitter Card Images for Link Previews

When you share a URL on Twitter, the platform fetches the page's Open Graph (og:image) tag and displays it as a Twitter Card. Twitter Cards appear at 1200×628px in a summary_large_image card format. If your website's og:image is not set or is the wrong size, Twitter falls back to a small square thumbnail — significantly reducing click-through rates.

Use this tool to resize your og:image to 1200×628px before setting it on your website. This ensures your shared links show the full-width Twitter Card format instead of the small fallback.

iPhone HEIC Photos — Twitter Ready

Twitter does not accept HEIC files. When you try to upload a HEIC photo directly to Twitter from a desktop browser, the upload either fails silently or shows a format error. This tool accepts HEIC files and converts them to JPEG before resizing — no extra step needed.

Tips for High-Performing Twitter Images

→Always attach an image to important tweets. Tweets with images get 150% more retweets than text-only tweets. Even a simple branded graphic outperforms a plain text post.
→Use 16:9 for maximum feed height. A 1200×675px image takes up the most vertical space in the Twitter feed, giving your tweet more scroll-stopping power than a square or portrait image.
→Add alt text to all images. Twitter allows alt text on uploaded images. Alt text improves accessibility and may influence how Twitter's algorithm understands your content.
→Use PNG for screenshots and slide-style graphics. Twitter compresses JPEGs heavily for text-heavy images. Uploading as PNG preserves sharp text in graphics and screenshots.

Privacy — Your Photos Never Leave Your Device

All resizing happens 100% in your browser using the HTML5 Canvas API. Your images are never uploaded to a server, never stored, and never analyzed. There is no cloud account, no retention policy, and no third-party access of any kind.

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Frequently Asked Questions

: 1200×675px (16:9 ratio). This displays at full width in the Twitter / X feed without cropping. It gives your tweet the maximum vertical space and visual impact.
: 1500×500px. Twitter crops the header differently on desktop and mobile — keep important content in the center 1260×420px safe zone, away from the bottom-left where your profile picture overlaps.
: Twitter profile pictures should be at least 400×400px. They display as a circle — at 48×48px next to tweets and up to 400×400px in the profile view. Center your subject with space around the edges.
: The most common cause is uploading an image at the wrong dimensions. Twitter resamples images that are too large or too small, adding blur. Upload at exactly 1200×675px for post images using this tool.
: 1200×628px. This is the og:image size that generates a summary_large_image Twitter Card when your URL is shared. Use this size for any image you want to appear as a full-width link preview on Twitter.
: Twitter does not accept HEIC files. Upload your HEIC photo here — it is automatically converted to JPEG and resized to your chosen Twitter dimensions in one step.
: PNG for graphics with text, logos, or screenshots — Twitter preserves PNG sharpness better than JPEG for high-contrast edges. JPEG for photos — smaller file size with minimal visible quality difference.
: Yes, completely free. No sign-up, no watermark, no usage limits. All processing happens in your browser — your photos never leave your device.