Should I rate my skills with stars, bars or percentages?

It is usually better not to. Graphic ratings are hard to interpret, can undersell you and may not be read correctly by applicant tracking systems.

Problems with visual ratings:

• Three stars out of five could mean "competent" to you and "weak" to the reader.
• Bars and circles are often images or shapes, so software may skip them entirely.
• Rating yourself highly in everything looks unrealistic; rating yourself modestly invites doubt.

Better options:

• List skills without levels.
• Use simple words where a level matters: "Advanced", "Intermediate", "Basic".
• Prove the level with experience: "Built monthly forecasting models in Excel using Power Query."

If you like a visual design, keep a text version of the level next to any graphic.

Plain text levels are clearer for human readers and safer for recruitment software.