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Encrypt text with ChaCha20-Poly1305 and a passphrase, free in your browser. Authenticated envelopes, random salt and nonce, and a failure on the wrong key.
Check keyword and phrase density in any text, see over-use warnings, and tune stop words and phrase length. Runs in your browser, nothing uploaded.
Estimate LLM tokens, context usage and input cost free in your browser. Compare GPT, Claude, Gemini and Llama windows, with honest limits on the estimate.
Paste tab-separated rows or Q:/A: pairs and get a clean Markdown table plus valid FAQPage JSON-LD. Escapes pipes, pads cells and explains limits.
Combine up to 20 PDFs into one file in the order you choose. Keeps page size, orientation and rotation. 500-page limit, no signup, files deleted after.
Paste page source and check title, meta description, canonical, robots, viewport, H1 count and Open Graph tags at once. Runs in your browser.
Upload a PDF, click a text line to restyle or move it, add new text and download a rebuilt file. 100-page limit, no install, deleted after processing.
Convert PDF pages to PNG at 72, 150 or 300 DPI. One page returns a single image; longer files come back as a ZIP. Up to 100 pages, no signup.
Extract the text layer from a PDF with the original column layout preserved. Copy it or download a .txt. Scans need OCR; this tool does not do it.
Convert a PDF to an editable Word document free, with a page break per PDF page. Layout is rebuilt, scans come out blank, and no OCR is applied.
Calculate a percentage of a number, what percent one value is of another, and percent increase or decrease, with the formula and steps shown.
Build a valid robots.txt with crawler groups, allow and disallow paths, crawl delay and a sitemap line. Copy the text; nothing is written to your server.
