Kostenlose Online-Tools

Plan lab dilutions with pipette volumes, 1:N ratio dilutions, and serial dilution schemes. Get C₁V₁=C₂V₂ stock aliquots, sample and diluent volumes, and step-by-step bench procedures in µL, mL, or L. Free, browser-based.

Convert PDF pages to JPG images in your browser with adjustable quality and resolution.

Combine multiple PDF files into one document in your browser, with drag-free reordering and instant download.

Split a PDF into separate files by page, fixed chunks, or custom ranges — entirely in your browser.

Add password protection and permission restrictions to PDF files entirely in your browser.

Upload a PDF and generate an AI summary using your own OpenAI, Anthropic, Google, or Groq API key.

Draft professional emails with AI using your own OpenAI, Anthropic, Google, or Groq API key.

Generate relevant social media hashtags for Instagram, TikTok, LinkedIn, and more using your own AI API key.

Resize images in your browser with custom dimensions, aspect-ratio lock, and format export.

Convert images between PNG, JPG, WebP, AVIF, and BMP right in your browser, with quality control and transparency handling.

Compress images in your browser by adjusting quality, output format, and max dimensions to reduce file size.

Convert HEX color codes to RGB and RGBA values with a live color preview.