---
title: "PepLookup (@peplookup) | Hashnode"
description: "Building PepLookup: free price-per-mg comparison for research peptides across 88 suppliers, plus a COA reader. Writing about data, tools and"
url: "https://hashnode.com/@peplookup"
---

@peplookup

# PepLookup

@peplookup · Joined November 2026

Building PepLookup: free price-per-mg comparison for research peptides across 88 suppliers, plus a COA reader. Writing about data, tools and

[Website](https://www.peplookup.com/)

### [Why I built a COA checklist instead of a PDF parser](https://peplookup.hashnode.dev/why-i-built-a-coa-checklist-instead-of-a-pdf-parser?utm_source=hashnode&utm_medium=feed)

Modelling trust in a lab report as data, in a tool that runs entirely in the browser

7 min read · [peplookup.hashnode.dev](https://peplookup.hashnode.dev/why-i-built-a-coa-checklist-instead-of-a-pdf-parser?utm_source=hashnode&utm_medium=feed)

[6d ago](https://hashnode.com/posts/why-i-built-a-coa-checklist-instead-of-a-pdf-parser/6aec99703222b370f5db7d08)