Feature Request: Live Multi-Platform Preview Panel see exactly how your post will render before publishing

[githb-ac]

TryPost's composer already lets users write and schedule content for multiple platforms, but there is currently no way to see how a post will actually render on each platform before it goes live. Font sizes, line breaks, link previews, hashtag formatting, image cropping, and character truncation all behave differently across Instagram, LinkedIn, X, Facebook, TikTok, YouTube, bluesky, Upscrolled, etc and discovering those differences after publishing is both frustrating and damaging to brand presentation. This feature request proposes a Live Multi-Platform Preview Panel built directly into the composer that renders an accurate, real-time visual preview of the post as it will appear on each selected platform.

Summary

A side panel or toggle view within the TryPost composer that displays a live, platform-accurate preview of the post being drafted updating in real time as the user types. Users can switch between platform previews with a single click, see exactly how text truncation, link cards, image crops, hashtag rendering, and mention formatting will appear on each platform, and catch formatting issues before scheduling rather than after publishing.

Why This Matters

Platform-specific formatting differences are one of the most common sources of post quality issues for social media managers. A caption that reads perfectly in the composer can publish with broken line breaks on LinkedIn, truncated text on X, or an incorrectly cropped image on Instagram. Every post that publishes with a formatting error represents a failure of trust in the tool. Live preview closes that gap entirely it is a core feature of professional publishing tools and one that users consistently request when moving from native platform apps to third-party schedulers. Buffer and Later both offer preview functionality, and it is now a baseline user expectation for any serious scheduling product.

Proposed MVP

Real-time preview panel that updates as the user types in the composer

Platform tabs for each connected account switching tabs shows that platform's accurate render

Accurate text truncation with "See more" indicators showing exactly where copy cuts off on each platform

Image crop preview per platform showing how the selected image will be framed in feed, grid, and story formats

Link card preview showing how the URL unfurl will appear including title, description, and thumbnail

Hashtag and mention rendering shown as they appear on each platform (clickable style, colour, placement)

Character count per platform with visual warning when approaching or exceeding platform limits

Mobile feed simulation so users can preview how the post looks on a mobile screen rather than desktop only

Flag indicator on the platform tab when a formatting issue is detected so the user knows which platforms need attention without switching to each one manually