why does font look different when i edit text in a jpeg image?

Font discrepancies when editing text in a JPEG image often arise from different font rendering engines such as the CSS font-family fallback chain or the availability of fonts across different platforms. When tools like EditTextImage or Photopea replace text, the original font may not be replicated perfectly if it is not commonly available or if the tool uses a fallback font.

the tool attempts to sample the surrounding text characteristics to closely match the original font, including size, color, and weight. However, due to limitations in font availability or slight mismatches in font rendering, there might be some visible differences.

Photopea allows for more manual control, enabling you to select from a wide range of fonts. However, unless the exact font used in the original image is available and selected, differences can occur. Additionally, the JPEG format itself can introduce artifacts during editing, which may affect the clarity of the text and alter its appearance.

To avoid these issues, consider using PNG for your images when possible, as it maintains better quality and allows for easier comparison with the original text through alpha channel preservation.