Jerry Liu(@jerryjliu0)2026年4月22日

LiteParse, our OSS document parser, is really good at parsing complex PDF layouts, text, and tables ...

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LiteParse, our OSS document parser, is really good at parsing complex PDF layouts, text, and tables ...

AI 深度提炼

LiteParse 不依赖 VLM 或 ML 模型，而是基于启发式算法。
核心机制包括 Y 坐标排序、锚点提取和文本分类。
通过网格投影算法实现高效精准的文档解析。

#PDF#文档解析#开源#算法

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The best part is it doesn't use VLMs or any ML models at all. It's entirely heuristics based and super fast ⚡️

The secret lies in our sophisticated https://t.co/WgwUbuQw8k" / X

Jerry Liu on X: "LiteParse, our OSS document parser, is really good at parsing complex PDF layouts, text, and tables into a clean spatial grid. The best part is it doesn't use VLMs or any ML models at all. It's entirely heuristics based and super fast ⚡️ The secret lies in our sophisticated https://t.co/WgwUbuQw8k" / X

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Jerry Liu

@jerryjliu0

LiteParse, our OSS document parser, is really good at parsing complex PDF layouts, text, and tables into a clean spatial grid. The best part is it doesn't use VLMs or any ML models at all. It's entirely heuristics based and super fast !Image 9: ⚡️ The secret lies in our sophisticated grid projection algorithm. This blog post by

@LoganMarkewich

gives a comprehensive walkthrough on how it works: !Image 10: 1️⃣ Sort lines based on similar Y coordinates !Image 11: 2️⃣ Extract left, right, and center anchors !Image 12: 3️⃣ Classify every text item into one of these anchors !Image 13: 4️⃣ Project every text item into a grid column (the exception is any paragraph of flowing text, which is rendered separately) !Image 14: 5️⃣ For any item projected into a grid column, that item is the forward anchor for all subsequent text items with the same anchor !Image 15: 6️⃣ Postprocess the final outputs to remove extraneous spaces and margins As an example, take a look at the results below. You can see text in the left column, with a nicely overlaid table on the right. LiteParse is fully free and open-source, you can use it today! Either directly through the CLI or integrated into your coding agent. Blog: https://llamaindex.ai/blog/how-litep arse-turns-pdfs-into-text-a-deep-dive-into-the-grid-projection-algorithm?utm_medium=socials&utm_source=xjl&utm_campaign=2026-apr-… LiteParse repo: https://github.com/run-llama/lite parse…

![Image 16: Image](http://x.com/jerryjliu0/status/2047041129326194882/photo/1)

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LlamaIndex !Image 18: 🦙

@llama_index

LiteParse: our open-source, layout-aware PDF parser for AI agents. The secret? Grid projection. Instead of heavy ML layout models or flat text extraction, it projects text onto a monospace grid so alignment preserves structure. Full deep dive into the grid projection algorithm

7:53 PM · Apr 22, 2026

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