Visual PeptideResearch-grade peptide tools
From sequence to dose—in one place
MW, pI, GRAVY, reconstitution, 3D structure, and purity verification. No more juggling calculators and databases.
Research and education only. Not medical advice.
How it works
Search or enter sequence
Use the search above or go to the main calculator to enter any sequence.Peptide Properties
Get properties & dose
MW, pI, GRAVY, charge, synthesis difficulty; recon & dosing for injection.
Verify purity
Check third-party reports (e.g. Janoshik) by task ID. Open Verify →
Any sequence → full properties
Enter any peptide sequence (1- or 3-letter codes). Get molecular weight, pI, GRAVY, charge at pH 7.4, and synthesis difficulty in one click. Batch mode for multiple sequences. Download PDF report for lab or publication.
3D Structure Viewer & Peptide–Receptor Demo
View peptide and receptor structures in-site (rotate, zoom, measure, export). Multi-frame: Semaglutide (6XBM) → GLP-1 receptor (7F9W).
Calculator · 3D Viewer · Export
Peptide properties (MW/pI), sequence analyzer, modification calculator; 3D viewer (sequence to 3D, PDB upload, disulfide); export formats and citation. Calculator → Tools →
Peptide Properties (MW/pI)
Sequence → molecular weight, pI, GRAVY, charge, synthesis difficulty.
Sequence Analyzer (composition/hydrophobicity)
Composition, hydrophobicity; multiple sequences at once. Table + export.
Modification Calculator (modification mass)
Recon & dosing, concentration, diluent volume, dose. Syringe units (0.3 / 0.5 / 1 mL).
Sequence to 3D
Generate Cα chain from sequence. View in-site, measure, export, cite.
PDB Upload
Load your PDB file. View, measure, export PNG/PDB.
Disulfide Bond Viewer
Visualize disulfide bonds in peptide structures.
Export Formats
PDB, PNG, PDF. Download and cite.
Citation Generator
Generate citations for structures and calculations.
Library
Browse by category. Search by name, CAS, or sequence.
Purity & Verify
Third-party testing (Janoshik). Verify batch reports by task ID.
Docs
Getting started, algorithms, data sources, tutorials.
Pricing
Free tier for research. Pro & Enterprise for teams and API.
Calculation standards & reproducibility — IUPAC, Bjellqvist (pI), Expasy ProtParam. All results traceable and citable.
Verify before you source: check third-party test reports (e.g. Janoshik) by task ID. Open Verify →