Simon Willison(@simonw)2026年4月23日

LiteParse is really neat! It does a great job of extracting text from annoying layouts in PDFs (mult...

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It's only available as a Node.js CLI app, so I vibe-coded up this version that runs in a browser https://t.co/xdawwDV7Kq" / X

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LiteParse is really neat! It does a great job of extracting text from annoying layouts in PDFs (multiple columns for example) It's only available as a Node.js CLI app, so I vibe-coded up this version that runs in a browser

![Image 1: Screenshot of the LiteParse browser demo web page. Header reads "LiteParse" with subtitle "Browser demo of LiteParse — parse PDFs in your browser. Nothing leaves your machine." A dashed-border drop zone says "Drop a PDF here or click to choose / Your file stays in your browser." with a file pill labeled "19720005243.pdf". Below are a checked "Run OCR" checkbox, an unchecked "Render page screenshots" checkbox, and a blue "Parse" button. Status text: "Parsed 86 pages." Two side-by-side panels follow. Left panel titled "Text" with a Copy button shows monospace extracted text beginning "Apollo 5 was an unmanned system, both propulsion systems ascent and descent stages". Right panel titled "JSON", also with a copy button, contains JSON showing the dimensions and position and detected font of each piece of text.](https://x.com/simonw/status/2047434783962354130/photo/1)

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Jerry Liu

@jerryjliu0

Apr 22

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 2: ⚡️ The secret lies in our sophisticated x.com/llama_index/st…

![Image 3: Image](https://x.com/jerryjliu0/status/2047041129326194882/photo/1)