📄 PDF 工具PDF Tools
PDF 合并Merge PDF
把多个 PDF 合并成一个文件：拖入文件后可上下调整顺序、按文件名排序、只取每个文件的部分页码，也支持输入密码合并加密 PDF，全程在浏览器本地完成。Combine several PDFs into one — reorder files, sort by name, take only selected pages from each file, and merge password-protected PDFs after unlocking them. Everything happens locally in your browser.
PDF 拆分Split PDF
把一个 PDF 拆成多个文件：每页单独一个、每 N 页一份，或按自定义范围（如 1-3,4-10）分段，结果可逐个下载或打包 ZIP，文件只在本地处理。Split one PDF into several files — one file per page, every N pages, or custom ranges such as 1-3,4-10 — then download each part or everything as a ZIP. Processed locally.
PDF 提取页面Extract PDF Pages
从 PDF 中挑出需要的页面另存为新文件：输入页码范围或直接点击缩略图选择，还能按输入顺序重新排列页面，原页面无损复制，不上传文件。Pull selected pages out of a PDF into a new file — type a page range or click thumbnails, optionally in a new order. Pages are copied losslessly and nothing is uploaded.
PDF 删除页面Delete PDF Pages
删除 PDF 中不需要的页面（空白页、广告页、多余的附录）：输入页码或点击缩略图标记删除，其余页面原样保留并另存为新文件，本地处理不上传。Remove unwanted pages — blank pages, ads, extra appendices — by typing page numbers or clicking thumbnails; the remaining pages are kept untouched in a new file. Local processing, no upload.
PDF 旋转Rotate PDF
旋转 PDF 页面：一次旋转全部页面、指定页码，或点击缩略图逐页设置 90°/180°/270°，适合修正扫描件方向；只修改页面方向属性，内容和画质不变。Rotate PDF pages 90°, 180° or 270° — all pages, a page range, or page by page by clicking thumbnails. Ideal for fixing scanned documents; only the page orientation changes, content and quality stay the same.
PDF 裁剪Crop PDF
裁剪 PDF 页面边距：按毫米设置上下左右裁掉的宽度并实时预览，或一键自动裁掉每页的白边，可只处理指定页码，适合去掉扫描黑边、放大阅读区域。Crop PDF page margins — set top/right/bottom/left in millimeters with a live preview, or auto-trim the white border on every page, optionally only for selected pages. Great for removing scan borders or enlarging the reading area.
PDF 扁平化Flatten PDF
把 PDF 表单字段的填写内容固定到页面上、不可再编辑；或整页栅格化，把批注、印章、签名图层全部合并为图片，防止被修改或在不同阅读器里显示不一致。Flatten a PDF: bake filled-in form fields into the page so they can no longer be edited, or rasterize every page to merge annotations, stamps and signature layers into the image — preventing edits and display differences between viewers.
PDF 元数据编辑Edit PDF Metadata
查看和修改 PDF 的标题、作者、主题、关键词、创建程序、生成器和创建/修改时间，支持中文；也可一键清除全部元数据（包括 XMP），发布文件前保护隐私。View and edit a PDF's title, author, subject, keywords, creator, producer and creation/modification dates (Unicode supported), or strip all metadata including XMP in one click to protect privacy before sharing.
PDF 解除密码Unlock PDF
用你知道的密码解锁加密 PDF，另存为无需密码、无打印/复制限制的新文件；只有权限限制（没有打开密码）的 PDF 可直接解除，支持 AES-256/AES-128/RC4，本地处理不上传。Unlock an encrypted PDF with the password you know and save a copy with no password and no print/copy restrictions. PDFs with only permission restrictions (no open password) unlock directly. Supports AES-256, AES-128 and RC4; processed locally.
PDF 加密Protect PDF with Password
给 PDF 设置打开密码（AES-256 加密），并可限制打印、复制文字、修改、批注、填写表单和页面重组；未填写权限密码时自动生成高强度随机密码，全部在本地完成，密码不会上传。Password-protect a PDF with AES-256 encryption and optionally restrict printing, copying, editing, annotating, form filling and page assembly. A strong random owner password is generated if you leave it blank. Runs locally — your password never leaves the browser.
PDF 压缩Compress PDF
在浏览器里减小 PDF 体积：重新压缩文件中的照片（降低分辨率和 JPEG 质量）并优化文件结构，文字保持可搜索；也可整页栅格化获得最大压缩率，会实时显示压缩前后大小。Shrink PDFs in your browser — re-compress embedded photos (lower resolution and JPEG quality) and optimise the file structure while text stays searchable, or rasterize whole pages for maximum compression. Before/after sizes are shown.
PDF 加水印Add Watermark to PDF
给 PDF 批量添加文字或图片水印：支持中文、多行文字、颜色、透明度、旋转角度，可放在中间、角落或平铺满页，也可置于内容下方，只处理指定页码，全部在本地完成。Stamp a text or image watermark on PDF pages — Chinese and multi-line text, color, opacity and rotation, placed in the centre, a corner or tiled across the page, optionally beneath the content and only on selected pages. All done locally.
PDF 签名Sign PDF
在 PDF 上添加手写签名：用鼠标或手指在签名板上书写、输入姓名生成签名，或上传签名照片并自动去除白底；拖动摆放到任意页面、调整大小，可放置多处，文件不上传。Add a handwritten signature to a PDF — draw it with a mouse or finger, type your name, or upload a photo of your signature with the white background removed. Drag it anywhere on any page, resize it, place it several times. Nothing is uploaded.
PDF 转 JPGPDF to JPG Converter
把 PDF 的每一页转换成高清 JPG 图片：可选 72–600 DPI 分辨率、JPG 质量、背景色和页码范围，多页可打包 ZIP 下载，适合发朋友圈、插入文档或网页展示，全部本地完成。Turn every PDF page into a sharp JPG image — choose 72–600 DPI, JPEG quality, background color and page range, then download each image or a ZIP. Ideal for social posts, documents and web pages; fully local.
PDF 转 PNGPDF to PNG Converter
把 PDF 页面转换为无损 PNG 图片，文字和线条边缘清晰锐利，可选透明背景（适合制作贴图、幻灯片素材），支持 72–600 DPI 和页码范围，批量打包 ZIP，文件不上传。Convert PDF pages into lossless PNG images with crisp text and line edges, optionally with a transparent background for overlays and slides. 72–600 DPI, page ranges and ZIP download; files never leave your device.
PDF 转 TIFFPDF to TIFF Converter
把 PDF 转换为 TIFF 图像：可合并成一个多页 TIFF 或每页单独保存，支持 LZW 无损压缩、彩色或灰度、72–600 DPI，写入分辨率信息，适合传真、存档和印刷流程。Convert a PDF into TIFF images — one multi-page TIFF or a file per page, with lossless LZW compression, color or greyscale and 72–600 DPI with resolution tags written. Suited to fax, archiving and print workflows.
PDF 转文本（提取文字）PDF to Text Converter
从 PDF 中提取全部文字并保留行和段落结构：支持中文、多栏间距识别、按页分隔，可复制或下载为 TXT；也提供“原始顺序”模式，加密 PDF 输入密码后同样可用，不上传文件。Extract all the text from a PDF while keeping lines and paragraph breaks — Chinese supported, column gaps detected, optional page separators — then copy it or download a TXT. A raw-order mode is also available, and encrypted PDFs work with their password. No upload.
PDF 转 WordPDF to Word Converter
把 PDF 转成可编辑的 Word（.docx）：自动把文字整理成段落、识别标题并套用 Word 标题样式、保留分页；也可选择“每页一张图片”模式完整保留版式。中文可用，文件在本地生成。Convert a PDF into an editable Word (.docx) document — text is rebuilt into paragraphs, headings are detected and mapped to Word heading styles, page breaks are kept. Or choose one-image-per-page to preserve the exact look. Chinese supported; generated locally.
PDF 转 ExcelPDF to Excel Converter
把 PDF 里的表格和数据转换成 Excel（.xlsx）：按文字位置自动分行分列，金额和千分位数字转为真正的数值，每页一个工作表或合并到一张表，转换前可预览，全部在浏览器完成。Convert tables and data in a PDF to Excel (.xlsx) — rows and columns are inferred from text positions, amounts with thousands separators become real numbers, one sheet per page or all on one sheet, with a preview. Runs entirely in your browser.
PDF 转 PPTPDF to PowerPoint Converter
把 PDF 每一页转换成 PowerPoint（.pptx）幻灯片：幻灯片尺寸自动匹配 PDF 页面比例，画面高清不变形，页面文字可写入演讲者备注方便搜索和讲解，在浏览器本地生成。Turn each PDF page into a PowerPoint (.pptx) slide — slide size matches the PDF page ratio, pages stay sharp and undistorted, and page text can go into the speaker notes for searching and presenting. Generated locally in your browser.
PDF 转 EPUB 电子书PDF to EPUB Converter
把文字型 PDF 转换成可重排的 EPUB 3 电子书，在手机、Kindle（经转换）、Apple Books 上自动适应屏幕：自动合并段落、按标题或页数分章、生成目录，可修改书名和作者，本地完成。Convert a text-based PDF into a reflowable EPUB 3 e-book that adapts to phones, Apple Books and other readers — paragraphs are merged, chapters split by headings or page count, a table of contents is generated, and you can set title and author. Runs locally.
HEIC 转 PDF（iPhone 照片）HEIC to PDF Converter
把 iPhone 拍的 HEIC/HEIF 照片转换成 PDF：可一次放入多张并调整顺序，每张一页，可选按照片尺寸或 A4/Letter 纸张、页边距和 JPEG 质量；也能混入 JPG/PNG，在浏览器本地解码，不上传。Turn iPhone HEIC/HEIF photos into a PDF — add several, reorder them, one photo per page, sized to the photo or to A4/Letter with margins and JPEG quality. JPG/PNG can be mixed in. Decoded locally in your browser, nothing uploaded.
GIF 转 PDF（支持动图逐帧）GIF to PDF Converter
把 GIF 图片转换成 PDF，动图可以拆成每帧一页（适合把表情包、动画分镜或教程步骤打印出来），也可只取第一帧；多文件合并、排序，默认无损保存像素，全部在浏览器完成。Convert GIF images to PDF — animated GIFs can be split into one page per frame (handy for printing storyboards, tutorials or sticker sheets) or reduced to the first frame. Combine and reorder several files; pixels are stored losslessly by default, all in your browser.
TIFF 转 PDF（多页扫描件）TIFF to PDF Converter
把 TIFF/TIF 文件（包括扫描仪和传真生成的多页 TIFF）转换为 PDF：每页一页，按 TIFF 记录的 DPI 还原真实纸张尺寸，支持 LZW、Deflate、PackBits、CCITT 传真压缩，黑白和灰度页无损保存，本地完成。Convert TIFF/TIF files — including multi-page scans and faxes — to PDF, one page per image, restoring the real paper size from the stored DPI. Handles LZW, Deflate, PackBits and CCITT fax compression and stores black-and-white and grayscale pages losslessly, all locally.
TXT 转 PDF（纯文本转 PDF）TXT to PDF Converter
把 TXT 文本或粘贴的文字排版成 PDF：自动识别 UTF-8/GBK/Big5 编码，中文自动嵌入字体，可设字号、行距、页边距、纸张方向，支持行号、页眉文件名和页码，中英文自动换行，换页符分页，本地生成。Typeset a TXT file or pasted text into a PDF — UTF-8/GBK/Big5 detected automatically, CJK font embedded when needed, adjustable font size, line spacing, margins and orientation, optional line numbers, filename header and page numbers, proper wrapping for Chinese and English, form-feed page breaks. Generated locally.
CSV 转 PDF（表格打印）CSV to PDF Converter
把 CSV 数据排成可打印的 PDF 表格：自动识别逗号/分号/Tab 分隔和文件编码，列宽按内容自动分配，长文本在单元格内换行，表头每页重复，数字右对齐，列多时自动横向或缩小字号，可加网格线、斑马纹和页码。Lay out CSV data as a printable PDF table — comma/semicolon/tab delimiters and file encoding detected, column widths sized to content, long text wrapped inside cells, header repeated on every page, numbers right-aligned, automatic landscape or smaller font for wide tables, plus optional grid lines, zebra stripes and page numbers.
PDF 全文搜索PDF Search
在本地 PDF 中搜索文字，按页列出上下文（非云端）。可设置「搜索词」、「区分大小写」。Search text in a local PDF and list page contexts (nothing uploaded). Settings: Search, Case sensitive.
PDF 转 BMPPDF to BMP Converter
把 PDF 每一页转换成 24 位 BMP 位图：可选 72–600 DPI 和页码范围，白色背景、无压缩，适合老式软件、工控设备、嵌入式屏幕和需要 BMP 的打印/刻字程序，多页可打包 ZIP，本地完成。Convert each PDF page into an uncompressed 24-bit BMP bitmap at 72–600 DPI with a page range — for legacy software, industrial and embedded displays, and cutting or printing programs that require BMP. Multi-page results download as a ZIP; fully local.
PDF 转 GIF（可合成动图）PDF to GIF Converter
把 PDF 页面转换为 GIF 图片：可以每页一张 GIF，也可以把所有页合成一个循环播放的 GIF 动图（适合把幻灯片、说明书做成动图），可设每页停留时间和分辨率，本地生成。Turn PDF pages into GIF images — one GIF per page, or all pages combined into a looping animated GIF (great for slides and instructions) with a per-page delay and resolution. Generated locally.
BMP 转 PDFBMP to PDF Converter
把 BMP 位图（Windows 画图、截图、扫描软件和工控设备导出的 .bmp）转换为 PDF：多张合并为一个文件并可调整顺序，默认无损保存，体积通常比 BMP 小很多，可选纸张大小和页边距，本地完成。Convert BMP bitmaps — from Paint, screenshots, scanners and industrial equipment — into a PDF. Combine and reorder several files; pixels are stored losslessly by default and the PDF is usually far smaller than the BMPs, with page size and margins. Done locally.
JFIF 转 PDFJFIF to PDF Converter
把 .jfif 图片（从网页、微信、WhatsApp 保存下来的常见格式）转换为 PDF：多张合并、调整顺序，直接保留原 JPEG 数据不再二次压缩，画质无损，可选 A4 等纸张，本地完成。Convert .jfif images — the format browsers, WeChat and WhatsApp often save — into a PDF. Combine and reorder several; the original JPEG data is embedded without recompression, so quality is unchanged, with A4 and other page sizes. Done locally.
SVG 转 PDF（保留矢量）SVG to PDF Converter (Vector)
把 SVG 矢量图（Logo、图标、图表、设计稿）转换为矢量 PDF：路径、渐变和文字保持矢量，可无限放大，文字仍可选中和搜索；按 SVG 声明的尺寸（px、mm、in 等）还原纸张大小，也可放到 A4/Letter 上，多个 SVG 合并为多页 PDF，本地完成不上传。Convert SVG graphics — logos, icons, charts and design files — into a vector PDF. Paths, gradients and text stay vector, so they scale without blur and the text can still be selected and searched. The page keeps the size the SVG declares (px, mm, in …) or fits A4/Letter, and several SVGs merge into a multi-page PDF. Local, nothing uploaded.
PDF 转 RTF（富文本）PDF to RTF Converter
把 PDF 中的文字提取并重建为 RTF 富文本文档：自动合并段落、识别标题（加粗放大）、还原简单表格、保留分页，中文完整保留。RTF 可用 Word、WPS、写字板、LibreOffice 和 TextEdit 打开编辑，本地转换。Extract the text of a PDF and rebuild it as an RTF rich-text document — paragraphs are merged, headings detected (bold and larger), simple tables restored and page breaks kept, with full Chinese support. Open and edit RTF in Word, WPS, WordPad, LibreOffice or TextEdit. Converted locally.
CBZ 转 PDF（漫画）CBZ to PDF Converter
把 CBZ 漫画/电子书（装满图片的 ZIP 包）转换为 PDF：按文件名自然排序（1、2、10 不会乱序），自动跳过非图片和系统隐藏文件，JPEG 页面默认直接嵌入原始数据、不再压缩，可选按图片尺寸或 A4 页面，本地完成。Convert CBZ comics and e-books (ZIP archives full of images) into a PDF. Pages follow natural filename order (1, 2, 10 — never 1, 10, 2), non-images and system junk files are skipped, original JPEG data is kept without recompression, and pages can match the images or A4. Done locally.
PDF 页面整理（排序/旋转/删除）Organize PDF Pages
在一个页面里整理 PDF：拖动缩略图调整页面顺序，逐页旋转、复制或删除，也可以直接输入新顺序（如 3,1-2,6-4，支持倒序范围），一键把当前顺序倒过来，最后另存为新 PDF；页面内容原样复制，不重新压缩。Rearrange a PDF on one screen — drag thumbnails to reorder pages, rotate, duplicate or remove any page, or type a new order such as 3,1-2,6-4 (descending ranges allowed), reverse the current order in one click, then save a new PDF. Page content is copied as-is, never re-compressed.
PDF 对比（文字差异比较）Compare PDF Files
比较两个 PDF 的文字内容差异：按行或按词对齐，删除的内容标红、新增的标绿，标出所在页码，相同部分自动折叠；可忽略大小写和空格差异，结果可下载为文本报告，适合核对合同、论文和文档修订版本，全程在浏览器内完成。Find the text differences between two PDFs — aligned by line or by word, with deletions in red, additions in green and page numbers for each change, unchanged parts collapsed. Optionally ignore case and spacing, and download the result as a text report. Handy for checking contract, paper and document revisions; runs entirely in your browser.
ODS 转 PDF（LibreOffice 表格转 PDF）ODS to PDF Converter
把 LibreOffice / OpenOffice Calc 的 ODS 表格转换成可打印的 PDF：可选择工作表，单元格按显示格式输出（日期、货币、百分比保持原样），列宽按内容分配，长文本自动换行，表头每页重复，列多时自动横排，中文字体自动嵌入，全程本地完成。Turn a LibreOffice / OpenOffice Calc ODS spreadsheet into a printable PDF — pick the sheet, cells keep their displayed format (dates, currency, percentages), columns are sized to content, long text wraps, the header repeats on every page, wide sheets switch to landscape, and CJK fonts are embedded automatically. Fully local.
FB2 转 PDF（电子书转 PDF）FB2 to PDF Converter
把 FB2（FictionBook）电子书转换成 PDF：自动识别 UTF-8 / Windows-1251 等编码，支持 .fb2.zip，提取书名、作者、章节标题、正文、诗歌和注释，可选每章另起一页，自动换行并嵌入中文/西里尔文字体，转换前还能修改文字，全程本地完成。Convert an FB2 (FictionBook) e-book into a PDF — UTF-8, Windows-1251 and other encodings detected, .fb2.zip supported. Title, author, chapter headings, body text, poems and notes are extracted, each chapter can start on a new page, text wraps with embedded Cyrillic and CJK fonts, and you can edit the text before converting. Fully local.
PDF 修复（打不开的 PDF 恢复）Repair PDF
修复损坏或打不开的 PDF：重建交叉引用表和文件结构，去掉文件头前的多余数据，跳过读不出的坏页，尽量恢复下载不完整的文件；结构无法恢复时可按页面图像重建。先保留文字和画质，修复结果显示恢复了几页、用的什么方式，全程本地完成。Fix a damaged PDF that will not open — the cross-reference table and file structure are rebuilt, stray bytes before the header removed, unreadable pages skipped, and partly downloaded files recovered as far as possible. If the structure cannot be saved, pages can be rebuilt from rendered images. Text and quality are preserved whenever possible, and the result tells you how many pages were recovered and how. Fully local.
PDF 转 MarkdownPDF to Markdown Converter
把 PDF 的文字层转换成 Markdown：按字号识别一、二级标题，识别项目符号和编号列表，把对齐的多列行转换成表格，并转义 Markdown 特殊字符；可加分页标记、预览渲染效果、复制或下载 .md。文件在浏览器本地处理，不上传。Convert a PDF's text layer to Markdown: headings detected from font size (levels 1 and 2), bulleted and numbered lists, aligned multi-column rows turned into tables, and Markdown special characters escaped. Add optional page markers, preview the rendered result, then copy or download the .md file. Processed locally in your browser — no upload.
PDF 阅读器（在线查看）PDF Reader (Online Viewer)
在浏览器里直接打开和阅读 PDF：翻页、跳到指定页、适合宽度/整页/固定比例缩放、旋转、全文查找（列出每处结果和所在页）、书签目录跳转、查看文档信息、复制当前页文字；支持键盘翻页和加密 PDF，文件不上传。Open and read a PDF right in your browser: page through it, jump to a page, zoom to fit width, fit page or a fixed percentage, rotate, search the full text (every match listed with its page), jump via bookmarks, view document info and copy the current page's text. Keyboard paging and password-protected PDFs are supported; nothing is uploaded.
AVIF 转 PDFAVIF to PDF Converter
把 AVIF 图片转换成 PDF：可一次放入多张并拖动调整顺序，每张一页，可按图片尺寸或 A4 / Letter 纸张排版并设置页边距，照片默认 JPEG 压缩、也可选无损；JPG、PNG、WebP 可以混在一起，全部在浏览器本地完成。Turn AVIF images into a PDF — add several and reorder them, one image per page, sized to the image or to A4 / Letter with margins, stored as JPEG by default or losslessly. JPG, PNG and WebP can be mixed in, and everything happens locally in your browser.
PPM 转 PDF（支持 PGM / PBM / PAM）PPM to PDF Converter
把 Netpbm 图片（PPM 彩色、PGM 灰度、PBM 黑白、PAM）转换成 PDF：支持 P1–P7 文本和二进制格式、16 位深度和一个文件里连续存放的多张图，每张一页，无损写入，可选 A4 / Letter 排版，全部在浏览器本地完成。Turn Netpbm images — PPM colour, PGM greyscale, PBM black-and-white and PAM — into a PDF. P1–P7 in plain-text and binary form, 16-bit depth and several images stored back to back in one file are supported; one image per page, stored losslessly, with optional A4 / Letter layout, all locally in your browser.
Markdown 转 PDF（MD 转 PDF）Markdown to PDF Converter
把 Markdown（.md）转换为排版整洁的 PDF：支持标题、粗斜体、删除线、有序/无序/任务列表、引用、代码块、GFM 表格、链接（PDF 中可点击）和图片，中文自动嵌入思源黑体，可设置纸张、字号、页边距和页码；图片可与 .md 一起选择，或选择加载网络图片，全程本地生成。Turn Markdown (.md) into a clean PDF with headings, bold/italic, strikethrough, ordered, bulleted and task lists, block quotes, code blocks, GFM tables, links (clickable in the PDF) and images. Chinese, Japanese and Korean text gets an embedded Noto Sans CJK font. Set the paper, font size, margins and page numbers; add images by selecting them with the .md file or by loading web images. Everything is generated locally.
DXF 转 PDF（CAD 图纸转 PDF）DXF to PDF Converter
把 AutoCAD 等 CAD 软件导出的 DXF 图纸转换为矢量 PDF：支持直线、圆、圆弧、多段线（含圆弧段）、椭圆、样条曲线、文字、多行文字、块参照、标注、实体填充和线型，按图层颜色和线宽输出，可开关图层，选择纸张、方向、比例（适应页面或 1:100 等）和彩色/黑白/灰度打印，正确显示 GBK 等编码的中文，文件不上传。Convert DXF drawings exported from AutoCAD and other CAD programs into vector PDF. Lines, circles, arcs, polylines (with arc segments), ellipses, splines, text, multiline text, block references, dimensions, solid fills and linetypes are drawn with layer colours and lineweights. Toggle layers and choose the paper, orientation, scale (fit to page or a fixed ratio such as 1:100) and colour, black or greyscale output. Chinese text in GBK and other code pages displays correctly, and nothing is uploaded.
PDF 转 ODT（OpenDocument 文本）PDF to ODT Converter
把 PDF 转换为可编辑的 OpenDocument 文本（.odt），可用 LibreOffice、OpenOffice、WPS 打开：读取 PDF 的文字层并重新整理成段落，大号文字识别为标题样式，对齐的行列整理成表格，保留分页和页面大小；也可选“每页一张图片”完整保留版式。可只转换部分页码，文件不上传。Convert a PDF into editable OpenDocument Text (.odt) for LibreOffice, OpenOffice and WPS. The PDF text layer is rebuilt into paragraphs, large text becomes heading styles, aligned rows and columns become tables, and page breaks and page size are kept. Or choose one image per page to keep the exact look. Convert all pages or a range; nothing is uploaded.
PDF 涂黑（敏感信息遮盖）Redact PDF
永久遮盖 PDF 里的敏感信息：在页面上拖动画出黑框，或输入关键词、勾选邮箱/手机号/身份证号/银行卡号自动查找并加框；导出时把有遮盖的页面重新渲染为图片，框下的文字、图片和隐藏图层都会从文件中删除，无法复制或恢复。文件不上传。Permanently black out sensitive information in a PDF. Drag boxes on the page, or search for words and common patterns (emails, phone numbers, Chinese ID numbers, card numbers) to add boxes automatically. On export the redacted pages are re-rendered as images, so the text, images and hidden layers under the boxes are removed from the file and can't be copied or recovered. Nothing is uploaded.
PDF 添加页码Add Page Numbers to PDF
给 PDF 添加页码：可选“1”“第 1 页 / 共 N 页”“Page 1 of N”等格式或自定义，放在页眉或页脚的左、中、右，双面打印可奇偶页左右交替；可设置起始页码、字号、颜色和边距，只给指定页加页码（例如跳过封面），横向和旋转页面也会正确摆放。全部在浏览器本地完成。Add page numbers to a PDF — "1", "1 / N", "Page 1 of N", "- 1 -" and other formats or your own, in the header or footer at left, centre or right, alternating left/right for double-sided printing. Set the starting number, font size, colour and margin, number only some pages (skip the cover, for example), and landscape or rotated pages are placed correctly. Everything runs locally in your browser.
PDF 转 CSVPDF to CSV Converter
把 PDF 里的表格转换成 CSV：优先按 PDF 自带的表格结构分行分列，没有结构时按文字位置推断，可选逗号、分号或制表符分隔，默认带 UTF-8 BOM，Excel 打开中文不乱码；可去掉数字里的千分位逗号，所有页合并成一个 CSV 或每页一个，转换前可预览。全部在浏览器本地完成。Convert tables in a PDF to CSV — rows and columns come from the PDF's table tags when present, otherwise from text positions, with comma, semicolon or tab delimiters and a UTF-8 BOM so Excel opens accented and non-Latin text correctly. Optionally strip thousands separators from numbers, and get one CSV for all pages or one per page, with a preview. Everything runs locally in your browser.
PDF 图片提取（导出 PDF 里的所有图片）PDF Image Extractor
把 PDF 里嵌入的图片逐张提取出来：按原始像素尺寸导出为 PNG（保留透明）或 JPG，自动去掉重复出现的图片（如每页的 Logo），可跳过小图标、只提取指定页，支持加密 PDF，可单张下载或打包 ZIP。全部在浏览器本地完成，文件不会上传。Extract the images embedded in a PDF one by one, at their original pixel size, as PNG (transparency kept) or JPG. Images repeated on many pages, such as a logo, are removed automatically, tiny icons can be skipped and you can limit it to certain pages. Password-protected PDFs are supported, and you can download images one by one or as a ZIP. Everything runs locally in your browser; files are not uploaded.
PDF 摘要（抽取式）Summarize PDF (Extractive)
从 PDF 抽取文本，按词频选出 1–30 个关键句做本地摘要（非生成式 AI）；加密的 PDF 输入打开密码即可。本地处理。Extract PDF text and pick the top 1–30 sentences by word frequency (extractive, not generative AI); for an encrypted PDF, enter its password. Processed locally.
与 PDF 对话（关键词检索）Chat with PDF (Keyword Search)
在 PDF 文本中检索与问题相关的句子并列出（非大模型）：自动去掉 who / what / 什么 / 哪里 等疑问词和停用词，按命中的关键词数排序。本地处理。Find sentences in the PDF that match the keywords in your question (not an LLM). Question and stop words such as who / what / the are ignored, and sentences are ranked by how many keywords they contain. Processed locally.
PDF 添加页码Add Page Numbers
给 PDF 每页加页码：可选位置（顶部/底部 × 左/中/右）和格式（1、Page 1、1 / N、第 1 页）。本地处理。Stamp page numbers on every PDF page: choose the position (top or bottom; left, centre or right) and the format (1, Page 1, 1 / N, or Chinese style). Processed locally.
PDF 加水印Add Watermark
给 PDF 每页加文字水印（居中斜放）。本地处理。可设置「打开密码」、「水印文字」、「字号」、「不透明度 %」。Stamp a diagonal text watermark on every PDF page. Processed locally. Settings: Password, Watermark text, Font size, Opacity %.
PDF 文字批注Annotate PDF
在 PDF 首页指定位置写入一行批注文字。本地处理。可设置「打开密码」、「批注」、「X」、「Y」、「字号」。Write a one-line text note onto the first page of a PDF. Processed locally. Settings: Password, Note, X, Y, Size.
ZIP 转 PDFZip to PDF
把 ZIP 里的图片按文件名排序拼成 PDF。本地处理。Build a PDF from images inside a ZIP, sorted by file name. Processed locally.
按比例缩放 PDF 页面Resize PDF
按比例缩放 PDF 每页内容与页面尺寸。本地处理。可设置「打开密码」、「缩放 %」。Scale every PDF page (content and page size) by a percent. Processed locally. Settings: Password, Scale %.
PDF 书签列表PDF Bookmarks
列出 PDF 书签（大纲）标题和层级，可复制或下载为 TXT / JSON。本地处理。可设置「打开密码」。List PDF bookmark (outline) titles with their levels, then copy them or download as TXT / JSON. Processed locally. Settings: Password.
清除 PDF 元数据Remove PDF Metadata
彻底删除 PDF 的文档信息（标题、作者、主题、关键词、创建/修改工具、日期等整条删除，不是清空）以及目录和各页上的 XMP 元数据流。本地处理。Delete the PDF document info entirely (title, author, subject, keywords, creator, producer, dates and any custom keys are removed, not blanked) plus the XMP metadata streams on the catalog and pages. Processed locally.
网页 / HTML 转 PDFWebpage / HTML to PDF
把粘贴的 HTML（或纯文本）排版成 PDF：保留标题、段落、列表、引用、代码块和表格行，自动去掉脚本和样式代码，中文等字符嵌入字体显示；无法显示的字符会提示。本地处理（不能抓取网址）。Lay out pasted HTML (or plain text) as a PDF, keeping headings, paragraphs, lists, quotes, code blocks and table rows, dropping script and style code, and embedding a font for Chinese and other characters; characters that cannot be shown are reported. Processed locally (cannot fetch URLs).
PDF 表单填写PDF Forms
列出 PDF 表单域（文本、勾选框、单选、下拉、列表）并按“域名=值”填写，可选拼合。本地处理。List PDF form fields (text, checkbox, radio, dropdown, list) and fill them with name=value lines, optionally flattened. Processed locally.
PDF 转灰度PDF to Grayscale
把每页渲染为灰度图后重新嵌入（栅格化）。本地处理。可设置「打开密码」、「DPI」。Rasterize each page to grayscale and rebuild the PDF. Processed locally. Settings: Password, DPI.