Lovable: Readable Previews for CSV and TSV Files

LovableSep 9, 2026View original changelog

Lovable now renders CSV and TSV files attached in chat as a proper table with numbered rows and lettered columns, instead of showing them as raw text. Large files are capped at the first 500 rows and 50 columns, with a prompt to download the file for anything beyond that limit. The change applies across every attachment method, whether a file is uploaded via the Chat actions menu, dragged in, or pasted.

Key Takeaways

CSV and TSV files render as tables, showing numbered rows and lettered columns instead of raw text when attached to chat.
Large files are capped for preview, showing the first 500 rows and 50 columns with a prompt to download anything beyond that.
The feature works across every attachment method, whether a file is uploaded through the Chat actions menu, dragged in, or pasted directly.
Files still work as context past the preview limit, so a file over 1 MB or beyond the row cap still informs Lovable's responses.
The change joins other structured previews, sitting alongside syntax-highlighted code files, Markdown toggles, and ZIP content listings.
It targets a common workflow, since spreadsheet uploads are a frequent way builders hand Lovable real data to work from.

Spreadsheet Data, Readable at a Glance

Lovable improved how CSV and TSV files appear when attached to a chat message, rendering them as a proper table with numbered rows and lettered columns instead of a raw block of text. The change applies wherever files are attached: through the Chat actions menu's Attach option, by dragging a file into the conversation, or by pasting it directly.

Built-In Limits for Large Files

For CSV or TSV files that run long, Lovable displays the first 500 rows and 50 columns and adds a note prompting a download for anything beyond that range, keeping the chat interface responsive even for sizeable exports. The tabular preview sits alongside Lovable's other file-preview formats, code files with syntax highlighting, Markdown with a preview and source toggle, and ZIP archives that list their contents, giving builders a consistent way to inspect data before asking Lovable to act on it. Files larger than 1 MB still work as context for Lovable even though they fall outside what can be previewed directly in chat.