Frequently asked questions

All tools work without registration or sign-in. There are no payments or account features. Open a tool, choose your file, and download the result.

Inputs and results are processed in the browser and are not sent to a server. Work and results are saved on this device for 30 days after the last save. Turn saving off or delete items in My work, and delete saved data after using a public computer. They cannot be recovered from another browser, device, or site address.

Stamp and signature PNGs have transparent backgrounds. Some viewers display transparent areas as white or checkered; that does not mean white pixels were added.

Stamp PNGs can be 256px, 512px, or 1024px square. Hangul and Han characters are supported, but Hangul is not automatically converted to Han characters.

Create a signature by drawing or entering a name. Typed signatures support Korean and English names with seven fonts; unsupported glyphs are reported before saving.

Choose a bright-paper signature photo, adjust crop, rotation, and removal strength, keep black, blue, or red ink, and save a transparent PNG. Dark backgrounds, large shadows, and complex backgrounds are not fully removed.

PDF page editing and PDF stamping do not support encrypted or damaged PDFs. Prepare a copy that opens normally. The source PDF is not changed.

No. It creates a separate new result. Original names, contents, and pixels are not changed automatically.

Address labels read UTF-8 and EUC-KR (CP949) CSV; table cleanup reads UTF-8 CSV and TSV. XLS/XLSX binaries are not supported, and leading postal-code zeroes, quoted commas, and line breaks are preserved.

Target bytes can only be adjusted within JPEG and WebP quality ranges. PNG and complex originals cannot guarantee an exact size, so check actual dimensions and bytes before saving.

Choose 100% or actual size for labels and print PDFs. Exact stock from a particular label company is not guaranteed, so test one sheet first.

It depends on the mobile browser and operating system. Check the browser downloads list or file app, then check download permission and storage if it is missing.

Choose another font or draw directly when glyphs are unsupported. If font loading keeps failing, send the reproduction steps from the contact page.

There is no AI generation feature. Enter names and text yourself and choose files; each tool processes them in the browser.

Use Contact or Request a tool and describe the input, expected result, and reproduction steps. You do not need to send the file or personal data.