All Free Online Tools
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114 tools
Standard Deviation Calculator
Compute population and sample standard deviation.
Text Diff Checker
Find added, removed, and changed lines between two texts.
Unlock PDF
Remove a known password from a PDF.
Word to PDF
Convert Word documents into PDF files.
AI Text Rewriter
Rewrite, simplify, fix, or restyle any text with optional AI assistance.
CSS Minifier
Compress CSS by removing comments and redundant whitespace.
PowerPoint to PDF
Convert presentations into PDF files.
Sales Tax / VAT Calculator
Add or remove sales tax and VAT from any amount.
Excel to PDF
Convert spreadsheets into PDF files.
Regex Tester
Test regular expressions and inspect matches and capture groups.
ROI Calculator
Calculate return on investment and annualized ROI.
Text Summarizer
Summarise long text into a concise summary and key points with AI.
Email Writer
Draft a complete, editable email from a short description with AI.
HTML to PDF
Convert HTML files into PDF documents.
Profit Margin Calculator
Calculate gross margin, markup, and profit.
GPA Calculator
Calculate weighted GPA from course grades and credits.
Quadratic Equation Calculator
Solve ax² + bx + c = 0 including complex roots.
Organize PDF
Reorder, rotate, duplicate and delete PDF pages.
Background Remover
Remove a solid or similar-color background and download a transparent PNG.
Crop PDF
Trim PDF page margins with a visual crop tool.
GCF & LCM Calculator
Find the greatest common factor and least common multiple.
Image Background Changer
Replace transparency with a chosen color, optionally removing a solid background first.
Watermark PDF
Add text or image watermarks to a PDF.
Add Page Numbers
Insert page numbers into a PDF document.