How it works. The checker runs pattern-based scans over your document — no AI, no uploads, everything in your browser. Checks: common misspellings (about 75 words, including water-industry terms like monitering); double spaces, spaces before punctuation, missing spaces after punctuation, trailing whitespace, 3+ blank lines; repeated words; unmatched parentheses/brackets/quotes; lowercase sentence starts; broken Word cross-references (Error! Reference source not found.); figure/table caption numbering gaps, references without captions, captions never referenced; missing space between number and unit (10mg/L); inconsistent units (mg/l vs mg/L); mixed date formats; double hyphens; page numbers on PDF uploads (missing, duplicate, or out-of-sequence). Cleaned text auto-fixes only the safe mechanical issues (whitespace and spacing) — spelling and content flags are left for your judgment. Free tier: the first 5 pages (about 2,500 words) of any document.