Fix quote marks in pasted text

The document wants curly typographic quotes but the paste brought straight " marks — or the reverse. Convert the whole text at once.

Tools used in this guide

The job

Word processors want “curly” quotes; code and plain text want straight " marks. Moving text between them leaves a mix that looks sloppy in print or breaks string literals in code. The converter flips the whole paste one way or the other, handling apostrophes by context.

Converting a document

Paste the text and choose the direction. Straight→curly turns opening quotes into “ and closing into ” by looking at what surrounds each mark; curly→straight is exact and lossless.

Apostrophes inside words (don't, it's) correctly become the closing form ’ — that is the typographically right apostrophe.
Leading apostrophes in contractions ('tis) also map to ’, not an opening quote.
Inches and feet marks (5'10") are straight quotes technically — converting them to curly would be wrong, so check measurements after converting.

Where it stops

The straight→curly direction uses heuristics: a quote inside code or an unmatched pair can come out the wrong way around. Read the result before shipping it. Curly→straight is exact. Up to 300,000 characters.