Free social media toolsthat run in your browser.
Quick, free utilities for anyone posting to social — character limits, best posting times, and more. They run entirely in your browser with nothing to install. When you're ready to automate the whole workflow, AnySync is here.
UTILITIES
Browse free tools
Each tool is free and instant. Open one and start using it — no account needed.
Best Time to Post Calculator
Free best time to post calculator.
The posting windows commonly cited for each network, converted from your audience's local time into yours. Pick a platform and where your followers are, and see exactly when to be publishing on your own clock. Free and runs entirely in your browser.
Explore →Social Media Character Counter
Free social media character counter.
Check your caption against every platform's limit at once. Paste your text and see live character counts for X, Bluesky, Threads, Instagram, TikTok, LinkedIn, and YouTube — and exactly how much room is left on each. Free, instant, and runs entirely in your browser.
Explore →Cross-Post Previewer
Free cross-post previewer.
Paste one post and see it rendered for X, Bluesky, Threads, Instagram, TikTok, LinkedIn, and YouTube at once — where each feed collapses it behind a “more” link, and where it runs past the hard limit entirely. Free, instant, and runs entirely in your browser.
Explore →Hashtag Counter & Limit Checker
Free hashtag counter and limit checker.
Paste a caption and see how many hashtags it carries, which ones repeat or won't link, and whether it clears each network's rules — including Instagram's five-hashtag cap introduced in December 2025. Free, instant, and runs entirely in your browser.
Explore →Social Media Image Size Guide
Free social media image size guide.
Every current upload size and aspect ratio for Instagram, TikTok, YouTube, LinkedIn, X, Facebook, and Pinterest — plus a crop checker that tells you exactly how much of your image each placement will cut. Free, instant, and runs entirely in your browser.
Explore →About the free tools
Are the tools really free?
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Yes. Every tool here is free to use, runs in your browser, and needs no account.
Do the tools send my content anywhere?
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No. They run client-side in your browser, so what you type stays on your device.
How do the tools relate to AnySync?
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They solve one small task each. AnySync automates the full loop — captioning, cropping, scheduling, and publishing across platforms.