常见问题Frequently asked questions
关于隐私安全、导入排版、导出打印，以及信息提取、OFD 转 PDF、本地台账与广告的常见疑问。Common questions about privacy, import & layout, export & printing, plus extraction, OFD-to-PDF, the local ledger and advertising.
我的发票会被上传到服务器吗？Are my invoices uploaded?
不会。本站是纯静态网站，所有处理都在你自己的浏览器里完成（图片解码、PDF 渲染、裁剪、排版、导出 PDF 都在本地内存中）。关闭或刷新页面后，数据即消失。No. This is a fully static site; all processing (decoding, PDF rendering, cropping, layout, PDF export) happens locally in your browser and disappears when you close or refresh the page.
手机上能用吗？Does it work on mobile?
可以，界面已适配手机。拍照上传发票后可直接裁剪排版；导出 PDF 后用系统打印或发到电脑打印更稳定。需要允许摄像头/相册权限。Yes, the UI is responsive. Upload invoice photos, crop and arrange; exporting a PDF then printing via the system is most reliable. Camera/photo permissions are needed.
税务局下载的 PDF 能直接排版吗？Can tax-bureau PDFs be laid out directly?
可以。PDF 会被逐页转成图片参与排版，并尝试从文本层识别发票号码、开票日期与金额。纯图片型 PDF 无文字层则不识别，但仍可排版打印。Yes. Each page is converted to an image for layout, and the number/date/amount are read from the text layer when available. Image-only PDFs without a text layer still lay out and print fine.
拍歪、有背景的发票怎么办？What about tilted or cluttered photos?
用裁剪按钮框选发票主体去掉杂物，用「旋转 90°」纠正方向。裁剪只影响排版用的副本，不会改动原图。Use Crop to frame the invoice and remove clutter, and Rotate 90° to fix orientation. Cropping only affects the copy used for layout, never your original.
导出的 PDF 会不会糊？Is the exported PDF blurry?
在「导出质量」选择「清晰打印」或「最高(1:1)」即可。分辨率越高越清晰但文件更大，日常报销用「清晰打印」通常足够。Choose Print or Max quality. Higher resolution is sharper but larger; “Print” is usually enough for daily reimbursement.
需要注册或付费吗？Do I need an account or payment?
都不需要。工具完全免费、无需注册、无水印、无次数限制。No. The tool is free, no sign-up, no watermark, no limits.
支持中英文吗？Is it bilingual?
支持。默认按浏览器语言显示，中文/繁体显示中文，其他显示英文；也可随时点右上角语言按钮切换，选择会被记住。Yes. It defaults to your browser language (Chinese/Traditional → 中文, others → English) and you can switch anytime with the language button; your choice is remembered.
支持 OFD 发票吗？Do you support OFD invoices?
支持常见文本/矢量型 OFD 电子发票（自动解析文字与路径）；含图片印章等复杂元素时可能无法完整解析，此时会弹出转换指引，按提示转成 PDF 即可。Common text/vector-based OFD invoices are supported natively. Files with complex elements (images/seals) may fail to parse — a conversion guide will pop up.
能省墨或加页码吗？Save ink or add page numbers?
可以。排版设置里有「黑白打印（省墨）」把发票转灰度，还有「页脚加页码」在每页底部印上「第 X 页 / 共 Y 页」，方便报销装订核对。Yes. In Layout settings you can enable “Grayscale (save ink)” to convert invoices to gray, and “Page numbers” to print “Page X / Y” at the bottom of each page for filing.
能自动识别发票金额吗？Can it read invoice amounts?
对税务局下载的带文字层 PDF，工具会尝试识别发票号码、开票日期与金额，并在“发票信息汇总”里列出并合计，可一键复制清单核对。拍照图片无文字层则不识别，但仍可正常排版打印。For text-layer PDFs it tries to detect the invoice number, date and amount, listing them with a total in the Invoice Summary that you can copy. Photos without a text layer aren’t parsed but still lay out and print fine.
改乱了能恢复吗？Can I undo a mess?
能。点「恢复默认」可一键把纸张、每页张数、边距、水印等排版设置还原；裁剪也只影响副本，随时可重新裁剪。Yes. "Reset" restores paper, per-page count, margins and watermark to defaults in one click. Cropping only affects the copy, so you can re-crop anytime.
信息提取工具有哪些功能？What can the Extract tool do?
在「信息提取」页批量上传发票，可自动识别发票代码、号码、开票日期、金额、税额、购销方等要素，汇总成表格并做「价税合计 = 不含税金额 + 税额」一致性校验，一键导出 Excel/CSV 台账。照片无文字层时先尝试读取票面二维码，再支持手工补录。On the Extract page, batch-upload invoices to auto-read the code, number, date, amount, tax, buyer and seller into a table, run a "total = net + tax" consistency check and export an Excel/CSV ledger. For photos it first tries the invoice QR code, then lets you fill fields manually.
为什么有些发票字段没识别出来？Why are some fields not recognized?
识别依赖 PDF/OFD 的文字层。多数税局 PDF 能自动读取号码、日期、金额；少数数电票的中文字体缺少编码映射，标签读不出时，工具会退而用票面 20 位号码、文件名或发票二维码兜底，仍可能漏掉开票日期或购销方名称。此时点击表格单元格即可手工补录，价税合计与税率一般会按票面自动填好。Recognition relies on the PDF/OFD text layer. Most tax-bureau PDFs read number, date and amount automatically. A few digital invoices use Chinese fonts without a proper encoding map; when labels can’t be read the tool falls back to the 20-digit number on the face, the file name or the invoice QR code, and may still miss the date or buyer/seller. Click a cell to fill it in — the total and tax rate are usually filled automatically.
OFD 转 PDF 会改变发票内容吗？Does OFD-to-PDF change the invoice?
不会。转换按原尺寸 1:1 高清还原 OFD 版式（含文字、线条与印章图片），支持多张批量合并为一个 PDF，解决单位只收 PDF 的痛点。No. It renders the OFD layout 1:1 at original size (text, lines and seal images) and can batch-merge into one PDF — solving the "we only accept PDF" problem.
本地发票台账安全吗？换电脑怎么办？Is the local ledger safe? What if I switch computers?
台账数据保存在你浏览器的 IndexedDB 里，不上传服务器，可跨会话累积、按月统计并做历史查重以防重复报销。换电脑或清理浏览器前，请用「导出 / 备份」保存 JSON 或 Excel，之后可导入恢复。Ledger data lives in your browser's IndexedDB (never uploaded), accumulates across sessions, gives monthly stats and duplicate checks. Before switching devices or clearing the browser, use Export/Backup to save a JSON or Excel file, which you can import later.
网站上有广告吗？会影响隐私或使用吗？Do you show ads? Do they affect privacy or use?
为了长期免费提供工具，本站可能展示 Google AdSense 广告。广告不影响任何工具功能，也不会读取你处理的发票内容；广告 Cookie 的说明与停用方式详见「隐私政策」。To keep the tools free, the site may show Google AdSense ads. Ads never affect functionality and never read your invoices. Details on advertising cookies and how to opt out are in the Privacy Policy.