The GenCRISPR gRNA Design Tools makes guide RNA and HDR template design easy – Simply select your experiment type to get started.

Start Your Project

Note: Selecting HDR knock-in will enable HDR template design options

Why choose our CRISPR design tools?

sgRNA design tool

  • Comprehensive species options, updated on-target and off-target scores
  • Designs target early exons to avoid truncated functional proteins
  • Higher transcript coverage
  • Ideal GC% for sgRNA
  • Validated KO% up to 97%, more detail>>
  • Design Tool User Guide

HDR knock-in template design tool

  • Supports 1-1500bp deletions, 1bp-20kb insertions
  • Linear ssDNA / linear closed-end dsDNA / circular dsDNA formats available
  • CTS option and updated on-target and off-target scores increase editing efficiency
  • Multiple sequence check function helps avoid mistakes
  • Design Tool User Guide

pegRNA design tool

  • Comprehensive Functions: Simply enter your desired gene symbol or sequence for guided support from design to ordering.
  • More Editing Approaches: Supports knock-ins, knockouts, and sequence replacement, with knock-ins up to 100 nt.
  • Enhances Editing Efficiency: Includes nicking sgRNA, 3' extension, and silent mutations.
  • Easy to Use: Displays base and amino acid changes, with multiple indices for easy selection.
  • Design Tool User Guide

Easily design compatible
HDR templates & sgRNAs

Automatically optimize
homology arm design

Select from ssDNA
or dsDNA formats

Create an SNP or insert
any sequence up to 20 kb

Streamline your HDR
template & sgRNA orders

sgRNA/template pairs are
ranked by algorithm scores

Interactive Design Map

Interactive Design Map

How to Design CRISPR Knock-in sgRNA + HDR Templates

Start Your Project

Note: Selecting HDR knock-in will enable HDR template design options

Other CRISPR gRNA Design Tool And Database

Broad gRNA Design Tool for Any Sequence

  • sgRNA designed for any DNA sequence you input
  • Algorithm developed and validated by Feng Zhang lab, Broad Institute

Broad sgRNA Database

  • Genome-wide gRNA databases for CRISPR editing and transcription activation
  • Pre-validated gRNA sequences design by the Broad Institute Ready for delivery; Full-Genome Coverage

GenCRISPR Services

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