The planner is 100% client-side. Your posts, captions, tags and any thumbnails live in your browser’s IndexedDB on this one device; there is no account, server, sync or upload anywhere in the tool. Thumbnails are read locally with the browser’s FileReader and downscaled on a canvas into small data-URLs before being saved. It deliberately has no social-platform API, so it cannot log in, schedule with the platform or publish — it is a planning and organising tool. It works offline once cached, and the only optional network use anywhere on the site is consent-gated ads, which never see your content.

This is a planner, not a publisher. Auto-publishing would require logging into your accounts and using each platform’s API, which a private, no-login, in-browser tool deliberately does not do. Instead it helps you decide what to post and when, keeps it organised on a colour-coded calendar, and exports the plan — as .ics for Google/Apple/Outlook calendars, CSV for a spreadsheet, or JSON for backup — so you can hand it to a real scheduler (Buffer, social management platforms, Metricool, Later) or set reminders and post by hand. Think of it as the planning layer that sits before whatever you use to actually publish.

The calendar is saved to IndexedDB in this browser and automatically reloads when you return on the same device and browser. Because it is stored locally and never synced, it is not backed up for you: clearing this site’s data, using private/incognito mode, or moving to another browser or device will lose it. The fix is to use Export JSON regularly — that downloads the entire calendar as a file you can re-import here later (import merges by post ID, so it will not duplicate posts you already have). CSV and .ics exports are for spreadsheets and calendar apps rather than re-importing into the planner.

When you pick platforms for a post, the editor shows one chip per platform with a live character count against that platform’s real caption/description limit — 280 for a free X post, 2,200 for Instagram and TikTok, 3,000 for LinkedIn, 5,000 for a YouTube description, 500 for a Pinterest description, and Facebook’s very long 63,206 — turning amber once you pass the rough “fold” where the feed hides the rest behind “more”, and red if you exceed the hard limit. Counting uses Unicode code points, which matches most platforms closely. These are current 2026 figures, but platforms change limits and the exact fold varies by device and app version, so treat the hints as a guide and always confirm by pasting into the app before publishing.