Does this developer tool upload my input to your servers?

No. These utilities run in your web browser. Your text is processed locally in this tab unless a tool explicitly states otherwise (for example, fetching your public IP uses a minimal server request).

Do I need an account to use this tool?

No account or sign-up is required. Open the tool and use it directly.

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PDF 工具

PDF merge

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Select multiple PDFs; order is top to bottom. Merging runs entirely in your browser — files are not uploaded to our servers.

Add PDFs

No files yet — use Add PDFs to begin.

Combine multiple PDF files in order — download one merged document. Runs entirely in your browser.

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优先同类别，再显示其他实用工具。

PDF extract pagesKeep only selected pages (ranges like 1-3, 5, 8) and download a new PDF — client-side only.PDF 工具
Case converterlower, UPPER, camelCase, PascalCase, snake_case, CONSTANT_CASE, Train-Case.文本工具
HEX to textDecode hex (with or without separators) back to UTF-8 text.文本工具
Line sorterSort, reverse, shuffle lines; optional line numbers — all client-side.文本工具
Lorem ipsum generatorGenerate placeholder paragraphs with adjustable length.文本工具
Text to HEXUTF-8 bytes to space-delimited hex.文本工具

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