Изображение към PDF

Convert images to PDF, right in your browser

This free image to PDF converter turns pictures into a clean PDF document in one click — no installs, no sign-up, no watermark. Add a single screenshot or a whole folder of photos, set how you want the pages to look, and download a finished PDF. Whether you searched for convert image to pdf, jpg to pdf or png to pdf, it's the same fast, free flow.

Because everything runs on your device, there are no per-hour limits and nothing to unlock. The only ceiling is your device's memory, so convert as many images as you need, as often as you need to. No file size cap, no registration.

Combine multiple images into one PDF

Need to turn a stack of pictures into a single file? Drop them all in and each image becomes one page, letting you combine images into a PDF in seconds. Drag the numbered thumbnails to set the order, rotate a sideways photo, or remove one you added by mistake — page numbers update live.

Useful for photographed contract pages, expense receipts, or batches of scans that all need to arrive as one document instead of a dozen separate attachments. No page limit; add as many as your device can handle.

Page size, orientation, margins and fit

You control how every page looks. Fit-to-image creates a borderless page sized exactly to each picture — ideal for screenshots. Pick standard A4 or Letter when the PDF needs to print correctly. Orientation can follow each image automatically or lock to portrait or landscape.

Add a margin for a white border, and decide whether images Contain (whole picture fits, possible white bars) or Cover the page (filled edge-to-edge, overflow cropped). All options update the preview instantly.

JPG, PNG, WebP and HEIC — all supported

The converter handles the formats people actually have: JPG and JPEG photos, PNG screenshots (transparency flattened to white), WebP, and HEIC/HEIF iPhone photos on browsers that decode them natively, like Safari on iPhone and Mac.

On Windows or Chrome where HEIC isn't supported, share the photo as a JPG first — that's the reliable route. You can mix formats in one batch: drop a WebP screenshot alongside three JPG photos and they all land in one PDF.

Keep full quality, or shrink the file

Leave quality on Original and each image is embedded at full resolution with no re-compression — best for archiving or printing. When you need to email the result, switch to Medium and images get re-encoded as compressed JPEGs, often cutting a multi-photo PDF from 40 MB down to 4 MB.

That's enough to stay under common attachment limits without leaving the page or running a separate compressor. Medium is the sweet spot for most sharing: looks identical to the original, roughly 60–70% smaller.

100% private — your files never upload

This is the difference that matters for sensitive documents. Server-based converters like iLovePDF and Smallpdf upload your images to their cloud infrastructure to build the PDF — iLovePDF also caps free tasks per hour. Adobe requires a subscription. Here the entire document is generated in your browser using pdf-lib, so photos and scans never leave your device.

No temporary copy on someone else's server, nothing logged, nothing stored. Safe for IDs, passports, bank statements and contracts. Works on iPhone, Android, Windows and Mac without any app install.

PDF page sizes explained: A4, Letter, Legal and A3

A4 (210 × 297 mm) is the world's most common document size, defined by the ISO 216 standard adopted in 1975. The ISO 216 family is based on a mathematical ratio where each sheet is exactly half the area of the size above it — an A5 page folded in half makes an A4, two A4 sheets side by side make an A3. This property means the aspect ratio (≈ 1:√2, or roughly 1:1.414) stays constant across the entire series, so scaling a document from A4 to A3 or A5 always produces perfect proportions without any cropping or distortion.

Letter (8.5 × 11 inches) is the North American standard, originating from the hand-press era when paper mills produced sheets that could be folded into those proportions easily. The US and Canada never adopted ISO 216, so Letter remains dominant in North America for business documents, legal filings and most office printers. Legal (8.5 × 14 inches) adds three inches of height and is common in US legal contracts and court documents where extra vertical space matters. A3 (297 × 420 mm) — double the area of A4 — is used for posters, technical drawings, architectural plans and spreadsheets too wide for A4. When choosing a page size for your PDF, match the size to where the document will be printed: A4 for most of the world, Letter for North American printers. Choosing the wrong size causes unnecessary white borders or cropping at the print shop.

For screen-only sharing the distinction rarely matters — PDF viewers scale to the screen — but for print-ready PDFs the size choice is critical. A job submitted to a European print house as Letter-sized will have a narrow white border when printed on A4 stock, and vice versa. Professional print workflows typically require the PDF's declared page size to match the substrate exactly.

How PDFs store images: JPEG, Flate and JBIG2 compression

A PDF is not a single flat image — it is a structured container that stores each embedded picture using its own compression stream. The most common compression type inside PDFs is DCTDecode, which is simply JPEG encoding. When you embed a JPEG photo into a PDF, the JPEG data is stored almost as-is inside the file container, which is why a PDF built from JPEG photos is only marginally larger than the original JPEGs combined. No second round of JPEG compression occurs unless you explicitly re-encode the image before embedding.

PNG images use lossless Flate compression (also called FlateDecode or DEFLATE, the same algorithm used in ZIP files) when embedded into a PDF. Flate is lossless, so every pixel is preserved exactly, but it tends to produce larger files than DCTDecode for photographic content — a reason why a PDF created from PNG screenshots is typically larger than one created from equivalent JPEGs. JBIG2 is a specialised compression format used for black-and-white bi-level images such as scanned text documents; it achieves very high compression ratios on monochrome content. Scanner software and dedicated OCR applications use JBIG2 automatically when creating PDFs from scanned pages, while general-purpose image-to-PDF converters typically default to JPEG or Flate. Understanding these compression types explains why your exported PDF's file size varies depending on whether you started with photos, screenshots or scanned pages.

When this tool's quality selector is set to Original, your image is embedded with its existing encoding preserved where possible, keeping the file size close to the source images. When you pick Medium or Low, images are re-encoded as JPEG at a lower quality factor — DCTDecode — before embedding. This is why the quality setting has a dramatic effect on photos (which compress well with JPEG) but a smaller effect on screenshots with flat colour regions (which JPEG encodes less efficiently than Flate).

PDF/A and long-term document archiving

PDF/A is an ISO standard (ISO 19005) designed specifically for the long-term preservation of electronic documents. Where regular PDF can embed external fonts, link to online resources, include JavaScript, or reference colour profiles stored outside the file, PDF/A requires that the document be entirely self-contained — all fonts embedded, all colour profiles included, no encryption, no JavaScript, no external dependencies. The result is a file that can be rendered identically decades into the future without needing access to external resources or specific software versions.

The standard has several parts: PDF/A-1 (2005, based on PDF 1.4) is the most conservative and most widely accepted by archives; PDF/A-2 (2011, based on PDF 1.7) adds support for JPEG 2000 compression and transparency layers; PDF/A-3 allows arbitrary file attachments inside the document. Government agencies, national archives, courts, medical records systems and financial institutions often mandate PDF/A for records that must remain readable beyond the typical lifespan of current software. The European Union, for example, requires PDF/A for official records submitted to EU institutions.

A standard PDF built from images is not automatically PDF/A — it may lack embedded colour profiles or include metadata that violates the standard. Converting your images here produces a regular PDF 1.7 document, which is appropriate for everyday sharing and printing. If you need a formally validated PDF/A for regulatory compliance, a dedicated PDF/A creation workflow (typically a PDF processor with an ICC colour profile and conformance validator) is required after the initial image-to-PDF step. That said, a simple image PDF with no fonts, no JavaScript and no external links is already structurally close to PDF/A-1 requirements.

Why PDF is better than an image file for sharing documents

Sending a document as a JPEG or PNG means the recipient sees one rasterised page at whatever resolution it was captured — zoom in and it becomes blocky, zoom out and text may be unreadable. A PDF, by contrast, has a declared page size, fixed layout coordinates, and an internal resolution that is independent of the viewing zoom level. A recipient opening the same PDF on a 4K monitor, a phone screen, or a printer at 600 DPI all sees the same layout. This device-independent fixed layout is the primary reason PDF became the dominant format for sharing documents intended for print or formal use.

PDFs also carry metadata — author, creation date, document title — and support a text layer when the source contains typed or OCR-processed text. A scanned document converted to PDF without OCR is purely image-based inside the container, but a document exported from a word processor carries selectable, searchable, copy-pasteable text. When a recruiter searches a received CV, or a lawyer searches a contract, that search works because of the text layer — something a JPEG can never offer. Even an image-only PDF benefits from the format's structural properties: it can be digitally signed, password-protected, annotated with comments, and reliably printed to exact page dimensions.

For multi-page documents the advantage compounds further. Sharing ten scanned pages as ten separate JPEGs forces the recipient to manage ten files, view them in order, and hope their viewer respects the filename sort. A ten-page PDF is one file, opens in any browser or device instantly, maintains page order, and can be printed as a booklet. The overhead of creating the PDF — which this tool reduces to a drag-and-drop — is almost always worth it compared to the friction a folder of images creates for the recipient.