By Team Hypomnema · Updated October 19, 2026
Find shared, missing and unique entries across two lists.
Use and export
Paste text, load a UTF-8 file or try the sample.
Choose options and select Run. Review the result, counts and any warnings.
Copy or download the result in an available format. Run again after changing inputs.
Methods and limits
Up to 25,000 lines per list. Compares distinct non-empty lines, with optional trimming and case sensitivity. First-list spellings/order are retained for shared entries. JSON includes all groups; plain text and CSV use the selected result group.
Private processing
Text and files stay in browser memory and a local worker. No uploads, account access, network lookups or automatic storage. Refreshing clears your work. Input is limited to 500 KB and generated output to 1 MB; processing times out after five seconds. Downloads and clipboard copies contain the output you choose.
Try the workflow
Keep your original documents and review the output. You can also browse all guides or contact Team Hypomnema.