Sometime, PDF to markdown remove space between words.

[onigetoc]

This came directly via tests in a project, but also the same behavior from your website, exactly the same error.
https://firecrawl.github.io/anydoc/

From this pdf: https://arxiv.org/pdf/2607.14186

Anydoc result:

## NEXFORGE: SCALINGAGENTCAPABILITIES THROUGH REQUIREMENT-DRIVENTASKSYNTHESIS FORLLMS

#### Jiarong Zhao¹, Zhikai Lei

**3,*** **, Zhiheng Xi², Rui Zheng³, Hang Yan³, Jie Zhou** **1,*** **,** **Qin Chen¹**,**Liang He¹** 1 East China Normal University 2 Fudan University 3 Shanghai Qiji Zhifeng Co., Ltd * Corresponding authors

### ABSTRACT

Scaling executable agent training data for LLM post-training *****

Another parser online will give:

https://anythingmd.com/

#  NEXFORGE: SCALING AGENT CAPABILITIES THROUGH REQUIREMENT-DRIVEN TASK SYNTHESIS FOR LLMS

Jiarong Zhao$^{1}$, Zhikai Lei$^{3}$,$^{*}$, Zhiheng Xi$^{2}$, Rui Zheng$^{3}$, Hang Yan$^{3}$, Jie Zhou$^{1}$,$^{*}$, Qin Chen$^{1}$, Liang He$^{1}$

$^{1}$East China Normal University    ${}^{2}$Fudan University    ${}^{3}$Shanghai Qiji Zhifeng Co., Ltd

*Corresponding authors

##  ABSTRACT

Scaling executable agent training data for LLM post-training *****

This behavior also happened in other circumstances via several PDF tests.