A JavaScript-based instant assessment tool for NGS data of CRISPR base edited cells.

Thanks to the improvements in the newest JavaScript engines in the most recent web browsers, the JavaScript based internal algorithm of BE-Analyzer completely runs on the client-side so that large amounts of sequencing data do not need to be uploaded to the server.

Citation info: Hwang G-H et al. Web-based design and analysis tools for CRISPR base editing. BMC Bioinformatics 19, 542 (2018).

To comfirm that the substitutions are derived from CRISPR base editors, it is recommended to compare the treated data with untreated one as a negative control.

Please input your data in below form, or download an example data here.

Sequencing Data

Control Data (optional)

Basic Information


Note that reference sequences can be adjusted according to the direction of crRNA. If your crRNA targets the opposite strand of reference sequences, they will be displayed as reverse complementary form.


  1. Komor AC et al., Nature 533, 420-424 (2016).
  2. Kim YB et al., Nature Biotechnology 35, 371-376 (2017).
  3. Nishida K et al., Science 353, aaf8729 (2016).
  4. Nicole MG et al., Nature 551, 464-471 (2017).
Analysis Parameters

BE-Analyzer is not compatible with Internet Explorer.
Please use a different browser, e.g. Chrome or Microsoft Edge.