Kavrylo is a free, browser-based watermarking tool that adds bold, repeating overlays to identity documents and PDFs, with all processing happening locally on the user's device.
What is Kavrylo?
Kavrylo is a privacy-first web application that lets you add a bold, repeating watermark to photos of passports, ID cards, driver’s licenses, or PDF documents. It accepts image files (JPG, PNG, WEBP, BMP) and multi-page PDFs, and exports the result as a PNG or PDF. The tool runs entirely in the browser using native Canvas API and JavaScript PDF libraries—no file ever leaves your device. It is developed and maintained by Kavrylo.
What makes Kavrylo stand out?
- Local browser processing – Files are never uploaded to a server; the watermark engine works entirely on your device using the browser’s Canvas API and PDF libraries. The tool even works offline after the page loads.
- Full PDF support – Upload multi-page PDFs and export the entire document as a watermarked PDF or as individual PNG images, one per page. Every page is processed automatically.
- Customizable watermark text – Choose preset labels (Bank, Rental, Insurance, Not Valid) or type your own text, and optionally add today’s date in one click. Every watermark also carries a “Secured by Kavrylo” attribution line.
- Multiple layout options – Select from diagonal tiling (recommended), horizontal tiling, or a single stamp. The repeating overlay is bold and obvious while keeping the document legible.
- Purpose‑tied output – The sticky watermark states the intended use and date, making the document unusable outside that specific context. Exported files are ready to share immediately.
- No account or cost – Use the tool instantly without signing up, and with no usage limits or subscriptions. It is completely free.
Who should use Kavrylo?
- Individuals sending identity documents to financial institutions – Watermark a passport or ID before using it for bank verifications or crypto KYC to prevent unauthorised reuse.
- Rental applicants – Add a watermark stating “Rental” and today’s date before sharing a driver’s license or ID with a landlord or property manager.
- Anyone sharing sensitive PDFs – Protect multi-page documents (e.g., insurance forms, contracts) by marking each page with a repeating overlay that names the recipient or purpose.
- Privacy‑conscious users – Anyone who wants to share a document scan without risking it being stored, forwarded, or exposed in a data breach.
Use cases
- Bank verifications: Watermark your passport or ID with “Bank” and today’s date before submitting it for account opening or loan applications.
- Rental applications: Mark your driver’s license or ID with the property name or “Rental” to limit use to that specific request.
- Crypto KYC: Protect your passport scan when submitting it to a crypto exchange by adding a watermark tied to that platform.
- Insurance claims: Watermark an ID document with the insurer’s name and claim number before emailing or uploading it.
How does Kavrylo work?
The tool follows three steps: (1) upload an image or PDF by dropping it or clicking to browse—no server involved; (2) enter the watermark text (e.g., “Bank”) and choose a layout (diagonal tiling, horizontal tiling, or single stamp); (3) generate the protected document and download it as a PNG or PDF. The entire process happens locally in the browser.
Pricing
Kavrylo is completely free to use. No account, no usage limits, and no subscriptions.
FAQ
Is my document uploaded to a server?
No. Everything runs locally in your browser. No file, image, or metadata is ever transmitted. After the page has loaded, Kavrylo even works offline.
Can I upload a multi-page PDF?
Yes. Kavrylo processes every page automatically. You can export the result as a single watermarked PDF or as individual PNG images, one per page.
