Free social media tools to get every post ready
Count characters for Instagram, X, LinkedIn, TikTok and YouTube, and resize one photo for every platform in one click. Everything runs in your browser, so your files never leave your device.
Social media character counters
Count, check and format captions for every platform.
Social media image resizers
Resize, crop and export images at the right size.
Coming next
New sections we’re building. All of them run in your browser too.
Photos and text are processed on your device, not on our servers.
Every tool works on a mid-range phone, even on a slow connection.
No sign-up, no watermarks and no daily limits.
Social media character limits 2026
The most-searched limits at a glance. Open any row to count your own text.
| Platform | Limit | Before “more” |
|---|---|---|
| X (Twitter) post | 280 | — |
| Instagram caption | 2,200 | ~125 |
| Instagram bio | 150 | — |
| LinkedIn post | 3,000 | ~210 |
| TikTok caption | 4,000 | — |
| YouTube title | 100 | ~70 |
| Threads post | 500 | — |
| Facebook post | 63,206 | ~125 |
Social media image sizes 2026
The sizes people ask for most, in pixels. Make them all from one photo with the resizer.
| Image | Size (px) |
|---|---|
| Instagram post (portrait 4:5) | 1080 × 1350 |
| Instagram story / reel (9:16) | 1080 × 1920 |
| Facebook page cover | 851 × 315 |
| X (Twitter) header | 1500 × 500 |
| LinkedIn profile banner | 1584 × 396 |
| YouTube thumbnail | 1280 × 720 |
| Pinterest standard pin (2:3) | 1000 × 1500 |
| WhatsApp profile photo | 640 × 640 |
Free online tools for social media posts
PrepMyPost brings the small jobs of posting on social media into one place. Paste a caption into the social media character counter to see at once whether it fits X, Instagram, Threads, LinkedIn, TikTok, YouTube, Facebook, Pinterest and Bluesky, and where each app cuts it off behind “more”. Platform-specific counters such as the X character counter count the way the platform does, with links as 23 characters and emoji as two.
For images, the social media image resizer turns one photo into every size you need — Instagram posts and stories, Facebook covers, X headers, LinkedIn banners, YouTube thumbnails, Pinterest pins and WhatsApp profile photos — and downloads them as one ZIP. You choose what stays in frame, or fit the whole photo on a blurred background.
Every tool runs in your web browser. Your photos and text are never uploaded, there is nothing to install and no account to create, and the tools work on phones as well as computers.
Frequently asked questions
Are PrepMyPost tools really free?
Yes. Every tool is free with no sign-up, no watermark and no daily limit. The site is funded by advertising.
Do you upload my photos or text?
No. The tools run in your browser, so images are resized and text is counted on your own device. Nothing is sent to our servers.
How do I resize one photo for every social media platform?
Open the social media image resizer, drop in your photo, choose what stays in frame, and download every size — Instagram, Facebook, X, LinkedIn, YouTube, Pinterest, TikTok and WhatsApp — as one ZIP.
How many characters can an Instagram caption or X post have?
An Instagram caption can have up to 2,200 characters (about 125 show before “more”), and an X post 280 characters, with links always counted as 23. The character counters check both as you type.
Do the tools work on my phone?
Yes. Every tool is built to work on phones, including mid-range Android devices, and you can share or paste photos straight in.