Since the creator of a popular screenshot editor brought the tool down, we've put together a screenshot editor that renders the text exactly as SAMP does. https://screens.ls-rp.com/ is now available (alias to https://sampscreens.com/). We're actively working on adding and polishing most features still, it was thrown together on a very short notice, but it's functional for basic purposes.
This thread serves as a discussion topic for the tool where you can suggest additions or changes, or report bugs.
On the radar right now:
Payphones and phone calls are not included/highlighted in the proper color.
Add grimey color correction overlay.
Add option to put text in a colored backdrop background, above or below the image. Added
Bottom texts can sometimes have 1px stroke missing. Fixed
Add blur as a filter.
Add static as a filter.
Allow manual override of which lines to include and to not include.
Add preview button to make the preview image larger and more visible to read.
Add /mydrugs and /givedrugs.