KeepMD EOB Decoder is a privacy-first browser extension for Chrome and Microsoft Edge that turns confusing Explanation of Benefits (EOB) and medical bill text into plain English. Paste a line from your EOB, open a text-based PDF, or highlight text on any webpage and right-click to decode it. The extension explains ICD-10-CM diagnosis codes, HCPCS Level II codes, and common insurance terms. Decoding happens locally in your browser, so your bill text is not sent to a server, and the extension does not track browsing history. If you want to keep the result, copy it, save a local draft, or send an encrypted handoff to the KeepMD app. Built for patients and caregivers who want to understand a bill before calling the insurer. • Paste-to-decode: paste a line from an EOB or medical bill and get a plain English explanation in the popup. • Local PDF reading: open a text-based PDF and the extension extracts the text on your device without uploading the file. • Right-click decode: highlight billing text on any webpage, right-click, and see the explanation in an overlay. • ICD-10-CM and HCPCS Level II codes: diagnosis, service, and supply codes explained in plain language. • Insurance term explanations: common EOB terms like allowed amount, deductible, and coinsurance explained. • CPT code detection: flags possible CPT codes (descriptions are not shown in the public build).