Browser extensions
Peptide Library in your browser
Five small, focused extensions built on the same engine and data as the Peptide Library app: calculate, convert, look up research, compare prices and check your inventory without leaving the page you're on.
For Google Chrome, Microsoft Edge, Mozilla Firefox, Opera, Safari.
The extensions
Peptide Calculator
Reconstitution and blend math with real syringe markings, one click from any tab.
Account: No.
About the Peptide Calculator →
Price Comparison
Vendor prices per mg or per unit, by product form, with shipping to your country.
Account: No.
About the Price Comparison →
Research Library
Mechanisms, studies graded by evidence, safety and regulatory status, with sources.
Account: No.
About the Research Library →
Inventory Tracker
Stock left, run-out dates, expiry and alerts, synced with your Peptide Library account.
Account: Yes, a Peptide Library account.
About the Inventory Tracker →
Unit Converter
mg, mcg, mL, µL, mg/mL, dilutions and molarity, in one fast popup that works offline.
Account: No.
About the Unit Converter →
Built to ask for little
No extension reads the websites you visit, injects links into other sites or loads code from the internet. Everything you save stays in your browser unless a feature syncs it to your own account.
- • Calculations and conversions run on your device with exact decimal math.
- • Research content never includes dosing; studies are labeled by evidence tier.
- • Vendor links open only when you click them, and affiliate links are labeled.
- • Usage counts are off until you say yes, and never name a peptide or person.
Read the privacy policy for the extensions or contact support.
Questions
Are the extensions free?
Yes. All five are free. The Inventory Tracker needs a Peptide Library account (free accounts track one item), and syncing saved calculations needs Pro, as in the app.
Which browsers are supported?
Chrome, Microsoft Edge, Firefox, Opera and Safari on Mac, iPhone and iPad. Each extension is built for each browser from the same source.
Can the extensions see the websites I visit?
No. None of them asks for access to websites or reads pages. They only use their own storage (and, for inventory alerts, notifications you allow).
What do the extensions collect?
Nothing unless you agree. If you allow anonymous usage counts, they send daily totals of feature use and errors per extension, browser and version. No account, peptide names, searches, amounts or browsing history. Details are in the privacy policy.
Why five extensions instead of one?
Each does one job well and asks only for what that job needs. Install the ones you use.
Research and educational use only. Not medical advice. Peptide Library does not sell peptides.