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Beyond a Single Extractor: Re-thinking HTML-to-Text Extraction for LLM Pretraining

Cui Cui Follow Feb 26, 2026 · 1 min read
Beyond a Single Extractor: Re-thinking HTML-to-Text Extraction for LLM Pretraining

One of the first pre-processing steps for constructing web-scale LLM pretraining datasets involves extracting text from HTML. Despite the immense diversity of web content, existing open-source dataset…

Executive Summary

One of the first pre-processing steps for constructing web-scale LLM pretraining datasets involves extracting text from HTML. Despite the immense diversity of web content, existing open-source datasets predominantly apply a single fixed extractor to all webpages. In this work, we investigate whether this practice leads to suboptimal coverage and utilization of Internet data. We first show that while different extractors may lead to similar model performance on standard language understanding tasks, the pages surviving a fixed filtering pipeline can differ substantially. This suggests a simple…

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Technical Deep Dive

One of the first pre-processing steps for constructing web-scale LLM pretraining datasets involves extracting text from HTML. Despite the immense diversity of web content, existing open-source datasets predominantly apply a single fixed extractor to all webpages. In this work, we investigate whether this practice leads to suboptimal coverage and utilization of Internet data. We first show that while different extractors may lead to similar model performance on standard language understanding tasks, the pages surviving a fixed filtering pipeline can differ substantially. This suggests a simple…

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This post was automatically curated from RSS. Published on 2026-02-26T17:02:06.437Z.

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Cui
Written by Cui Follow
Hi, I am Z, the coder for cuizhanming.com!

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