PDF to WebP Converter

PDF pages to WebP, on your device. Nothing ever uploads.

Drop PDFs below — get a small modern WebP for every page you pick, at the DPI you choose, lossy or genuinely lossless, with transparent backgrounds kept if you want them, in batches of up to 20. Converted entirely on your device.

  • Your file data never leaves the device
  • Batch up to 20 PDFs + ZIP
  • Page ranges + 72/150/300 DPI
  • Genuine lossless toggle
  • Transparent-background toggle

Convert PDF to WebP

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Loading the WebP encoder…

Rendered in your browser with pdf.js and encoded with libwebp — each page is drawn to canvas at your chosen DPI and saved as WebP. Nothing is uploaded.

    No files yet. Everything stays on this device. Downloads start instantly.

    Privacy you can verify, not just trust

    Most online PDF-to-WebP converters upload your documents to their servers first — and several cap free conversions at 3 a day. This one can't: pdf.js renders your PDF pages and libwebp encodes them to WebP entirely in your browser. Your file data never leaves the device — the only third-party requests are the site's own analytics, which count page views — and it uploads nothing, ever. There is no file fetched after load for the conversion itself. Don't take our word for it:

    New cross-origin requests during use: 0
    1. Press F12 to open developer tools, then the Network tab.
    2. Convert any PDF above. Watch: apart from the site's analytics, nothing new is requested — no uploads, and no file data ever leaves your device.
    3. Extra credit: disconnect your internet after this page loads — conversion still works.

    How to convert PDF to WebP without uploading it

    Every "free" online PDF-to-WebP converter you've used uploads your document to a company server, converts it there, and — in several documented cases — keeps a copy or a live download link for days. For contracts, payslips, medical letters, and anything you wouldn't post publicly, that's an unnecessary risk. The safer approach is to convert the file where it already is: on your own device.

    This tool does exactly that. When you drop a PDF here, your browser:

    1. Checks the file is really a PDF — by its %PDF magic bytes, not its name — and that pdf.js can open it, so a corrupt or truncated file is refused with a clear message instead of producing broken images. A JPEG renamed to .pdf is refused the same way, and a PDF renamed to .txt still converts.
    2. Reads the page count and sizes and shows you a preview thumbnail of each selected page, so you can see what will convert before anything is rendered.
    3. Renders each selected page to canvas with pdf.js at your chosen DPI and encodes it as WebP with libwebp — lossy at the quality you pick, or genuinely lossless with the Lossless toggle on — with the transparent-background toggle on, the WebP keeps the page's transparency; with it off, transparent areas are flattened onto your chosen background colour. Your original PDF is never modified, and no page is ever sent anywhere.

    What makes this converter different

    The pages that top the results for this search mostly convert on a server, cap free conversions per day, or ask for an account — the big names (iLovePDF, Smallpdf, Adobe) all upload your file and limit free use. The dedicated client-side pages we found each cover only part of the job: how7o.com offers a quality slider and a ZIP but no DPI choice, no page ranges and no lossless mode; Ulkaa and Sapphire Broking offer 72/150/300 DPI only; AstraPDF caps its free plan at 50 MB and pushes a Plus upsell; ToolsMatic is a bidirectional hub rather than a dedicated page; imageconvertit allows only 3 free trial files before Pro; FileCrisp offers a quality and width picker but no page ranges or lossless mode. None of them combines all of it — batch conversion, page ranges, DPI choice, a genuine lossless toggle, a transparency toggle, per-page previews and a ZIP — with no daily limits, no account and no watermark. This page is the only dedicated client-side PDF-to-WebP page we found that combines a batch of 20 PDFs with page-range selection (All, single page, or a custom range like "1-5, 8"), a DPI choice of 72/150/300, a genuine lossless toggle (canvas-only rivals cannot do lossless at all), a transparent-background toggle, per-page preview thumbnails, per-page downloads and a ZIP of the whole batch — with no daily limits, no account and no watermark — plus a live network-request counter so you can verify the privacy claim yourself. It runs entirely in your browser — there is no server to upload to.

    When is PDF-to-WebP the right choice?

    Whenever the destination wants a small modern picture, not a document — a page from a report on a website, a diagram or logo from a PDF laid over a coloured slide, a certificate or ticket posted to social media, a form page attached to an email, a scanned page uploaded to a form that only accepts images, or a single page printed at high quality. WebP is the right pick when file size matters and transparency might matter too: it beats JPG on size and keeps an alpha channel that JPG cannot have. If the destination accepts PDFs, keep the PDF — a WebP throws away the text layer and can never be searched or re-flowed. And if every pixel must survive exactly and size does not matter, a PNG is the safer pick — lossy WebP always re-encodes, so only the Lossless toggle is pixel-perfect.

    Honest limitations

    No text layer

    Each WebP is a rasterized render of a page — a picture, not the page itself. The text is not searchable and cannot be selected or copied from it. Copy the text from the PDF first if you need it.

    Lossy re-encodes

    Unless Lossless is on, the output discards some detail. Quality 85 is visually identical to the original for most pages, but quality 100 is near-lossless, not pixel-perfect. Keep your PDF as the master copy.

    Lossless files are larger

    Lossless WebP cannot throw detail away, so for photos it can come out bigger than a JPG of the same page. A WebP can never be sharper than the PDF page it was rendered from, so pick the lowest DPI that still looks sharp for your use.

    Transparency is your choice

    With the transparent-background toggle on, transparent areas stay transparent in the WebP. With it off, they are flattened onto your chosen background colour (white by default). Pages with a solid background are unaffected either way.

    No password-protected PDFs

    Password-protected PDFs are refused, and this tool never asks for a password. Remove the password in a desktop PDF tool first, then convert the unlocked copy.

    WebP size limit and memory

    WebP caps at 16383 px per side — a very tall page at 300 DPI is refused, so convert it at 150 DPI instead. Very large or page-heavy PDFs are memory-bound: 25 MB per file, 20 files per batch, 200 pages per PDF. Fonts render via pdf.js — rare exotic fonts may substitute. Metadata is dropped, and embedded images are not extracted — each WebP is a render of a whole page.

    Frequently asked questions

    Do my PDFs upload anywhere?

    No. Your PDFs are rendered and encoded to WebP entirely in your browser with pdf.js and libwebp — your file data never leaves the device, and the only third-party requests are the site's own analytics, which count page views. You can verify it yourself with the network-request counter in the privacy section below the converter.

    What DPI should I choose — 72, 150 or 300?

    72 DPI is enough for quick previews and thumbnails; 150 DPI is the default and the right pick for websites, slides, social posts, emails and upload forms; 300 DPI is for print and anything you will zoom into or crop later. Higher DPI makes sharper, larger WebPs — a 300 DPI A4 page is about 2480 × 3508 pixels, roughly four times the pixels of the same page at 150 DPI — so pick the lowest DPI that still looks sharp for your use. One hard limit: WebP caps at 16383 pixels per side, so a very tall page at 300 DPI can exceed it and is refused with a clear message — convert it at 150 DPI instead.

    How do I convert only some pages of a PDF?

    Use the page-range setting. All pages converts the whole PDF; Single page converts one page you pick by number; Custom range takes a list like 1-5, 8 — pages and ranges separated by commas. Out-of-range pages are reported per file with a clear message instead of failing silently, and each file's card shows exactly which pages are selected before you convert.

    Is the WebP output lossless or lossy?

    Your choice. Lossy is the default: quality 85 looks identical to the original for most pages and makes much smaller files — quality 100 is visually near-lossless but not pixel-perfect, because lossy WebP always re-encodes. Switch on the Lossless toggle and the encoder uses libwebp's true lossless mode, which stores every pixel exactly — a lossless WebP decodes back to the identical image. The quality slider is ignored while Lossless is on. Lossless files are larger than lossy ones, and for photos a lossless WebP can be larger than a JPG of the same page, so keep your PDF as the master copy and use WebP as the published version.

    Can I keep transparent backgrounds in the WebP?

    Yes — that is one of WebP's advantages over JPG. Switch on the transparent-background toggle and transparent areas of a PDF page stay transparent in the WebP, so you can drop the page onto a coloured slide, a design or a website background without a white box around it. With the toggle off, transparent areas are flattened onto the background colour you pick — white by default. Pages with a solid background are unaffected either way. JPG cannot do this at all, which is why WebP is the right format when transparency matters and file size matters too.

    Can I convert a password-protected PDF?

    No. Password-protected PDFs are refused with a clear message, and this tool never asks for a password. Remove the password in a desktop PDF tool first, then convert the unlocked copy here.

    Is WebP smaller than JPG or PNG?

    Usually, yes — for the same page. Lossy WebP at quality 85 is typically 25–35% smaller than a JPG of similar quality, and much smaller than a lossless PNG of the same page, because PNG has to store every pixel exactly. The exception is lossless mode: a lossless WebP of a photo page can be larger than a JPG, because lossless cannot throw detail away. This tool shows the before-and-after size honestly for every file, so you can see the saving instead of taking our word for it — and if a file comes out bigger, the card says so and you can keep the PDF.