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Developer Builds Tool to Preview Text Length Limits Across Social and SMS Platforms

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A developer has released a free browser-based tool called Multi-Platform Text Length Previewer, designed to help content creators and frontend engineers check how their text fits across different publishing channels. The tool displays character counts and visual overflow for platforms such as Twitter, LinkedIn, Google search snippets, and Instagram, each of which enforces different character limits. A separate SMS panel calculates message encoding and segment counts, using Unicode code-point iteration or GSM septet units rather than JavaScript's standard string length method. The developer notes that the tool's truncation logic is intentionally approximate, as it does not account for word boundaries, grapheme clusters, or carrier-specific SMS concatenation rules. It is intended as an early-stage check to catch obvious issues before final copy is pasted into the actual publishing platform.

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