rev

Reverse characters in each line

low risk

interactive breakdown — edit the command and press Explain
$ 
What it does

Reverses each line character by character.

Examples
echo hello | revolleh · explain & risk-check →
Related
tac
Open the full explainer →More in Text Processing

Reference text is hand-written and may be incomplete — check man rev for your version. Test destructive commands on a non-production system first.