Apa yang dilakukan PDF Watermark and Page Numbers?
PDF Watermark and Page Numbers membantu mengonversi data atau berkas langsung di browser serta menjelaskan hasil dan batasannya dengan jelas. Kemampuan yang telah diverifikasi: Unicode watermark text, Adjustable size and opacity, Page N of total labels, Local PDF export.
A visible watermark is not secure redaction
Use this tool to label drafts, review copies, or ownership visibly. Do not use it to hide confidential content: the original page objects remain in the PDF, and a determined editor may be able to remove an overlay.
Bagaimana cara menggunakannya?
- Open one unencrypted PDF no larger than the 100 MB browser limit.
- Enter up to 60 watermark characters, choose a size and opacity, and enable or disable Page N of total labels.
- Select Process, review the page count and output size, then download watermarked.pdf.
Contoh masukan dan keluaran nyata
Mark a twelve-page review copy
Masukan
Source: draft.pdf (12 pages)
Watermark: INTERNAL REVIEW
Size: 48
Opacity: 0.20
Page numbering: enabledKeluaran
watermarked.pdf
Diagonal watermark on every page
Bottom labels: Page 1 of 12 … Page 12 of 12Text is rendered to a transparent image in the browser, which permits Unicode characters supported by the local system fonts before the image is embedded into each page.
Kesalahan umum dan perbaikannya
| Gejala | Kemungkinan penyebab | Perbaikan |
|---|---|---|
| The PDF cannot be processed. | It is encrypted, damaged, incomplete, or not actually a PDF document. | Use an authorized unlocked copy or export a valid PDF before adding overlays. |
| The watermark is hard to read or covers important content. | Its size or opacity is inappropriate for the page design. | Reduce opacity for dense documents or adjust the size and process the original again. |
Important behavior of PDF Watermark
Batas khusus alat ini: The watermark is an ordinary visible PDF overlay, not tamper-proof rights management or secure redaction.
Standar dan referensi implementasi
- pdf-lib documentation (opens in a new tab)Documents the browser-side PDF loading, PNG embedding, opacity, rotation, and save operations used by this workflow.
- MDN — HTMLCanvasElement.toBlob() (opens in a new tab)Documents the local transparent PNG generation step used for Unicode overlay text.
PDF Watermark — FAQ
Does the PDF Watermark upload my input?
No. Processing runs in the current browser tab, and the page does not send tool input to a KitLumi processing endpoint.
What input does the PDF Watermark accept?
It accepts one unencrypted PDF, optional watermark text, size and opacity settings, and a page-number choice. The workspace checks the input and reports malformed or unsupported values before it produces a result.
What does the PDF Watermark produce?
It produces a downloadable PDF whose existing pages include the selected overlays. Copy and download controls appear when the output format supports them.
What limitation should I know?
The watermark is an ordinary visible PDF overlay, not tamper-proof rights management or secure redaction.
Apa yang berubah?
Pembaruan substantif: PDF Watermark: Added Unicode watermark text, Adjustable size and opacity, Page N of total labels, Local PDF export, responsive controls, explicit runtime disclosure, and task-specific examples and limitations.