PDF Tools Guide: Merge, Split, Rotate & Convert
Last updated: October 2026. PDF is the format the world agreed on for finished documents — contracts, invoices, bank statements, manuals, scanned paperwork. It is superb at carrying a page faithfully from one computer to another, and famously stubborn the moment you want to change it. This guide walks through the jobs people actually do with PDFs: merging files together, splitting pages out, deleting pages that should not be there, straightening sideways scans, and converting between PDF and everyday image formats. Each section explains when the operation makes sense and links a free tool for it — and every tool on this page runs entirely inside your browser, so your documents never touch a server.
Understanding PDF files
PDF (Portable Document Format) was created by Adobe in the early 1990s and later standardised as ISO 32000. The core idea is that a PDF is a digital print-out: rather than describing content that reflows like a web page, it places text, fonts, vector drawings and images at fixed coordinates on fixed-size pages. That is why a contract looks identical on a Windows laptop, an Android phone, a Linux workstation and at the print shop — the receiver's software does not get to re-typeset anything. It is also why PDF became the default "final form" for anything official: a signed agreement, a tax return, a diploma.
The same design explains why PDFs need tools at all. The format stores pages as a tree of objects with a cross-reference table, which makes casual editing in a text editor impossible and layout-aware editing genuinely hard. PDFs are not meant to be taken apart — they are meant to be exchanged. Real life disagrees, of course: you get three scans that belong in one file, a 40-page report where the recipient needs two pages, a sideways invoice, a photo that should be a document. Every job below is one of those everyday mismatches, and each has a tool that fixes it in seconds.
Merging PDFs into one document
Merging is the most common PDF job. A job application reads far better when the résumé and the cover letter arrive as a single attachment. A week of scanned receipts is far easier to file when it is one PDF rather than twelve. A report assembled from chapters written by different people — or a contract with its annexes and signatures — only makes sense as one file, in a deliberate order. Even a mixed bundle like "these three invoices plus the scanned estimate" is just a merge waiting to happen.
Two practical tips make merges painless. First, order matters: a good tool keeps the order in which you added the files, so arrange the list before you combine — re-reading a mis-ordered merged contract is nobody's idea of fun. Second, merge whole documents, not page ranges: if you only want pages 3–7 of one source file, extract them first with the splitting tool below, then merge the result. Our Merge PDF tool stitches files together in your chosen order right in the browser, handling up to 2,000 combined pages per batch.
Splitting and removing pages
Sometimes you do not need less of a file — you need a piece of it. Splitting turns every page into its own single-page PDF so you can keep only what matters: pulling the signed page out of a 30-page agreement, extracting one form from a bundle of scans, or carving a long report into chapters to send around separately. It is also the standard fix for attachment limits: a 25 MB scan that bounces off a mail server splits neatly into parts that do not. The Split PDF tool does this locally, up to 2,000 pages per run, and whatever you do not download vanishes when you close the tab.
Removing pages is the precise version of the same idea. Instead of keeping single pages, you name the pages to delete — a single number, a range, or a mix like 2, 4-6 — and everything else is rebuilt in order: blank pages from a scanner feeder, a duplicate, an outdated clause, a photo that came out black. The kept pages are copied as-is, not re-rendered, so quality is untouched. Type the numbers into Remove PDF Pages and download the trimmed file; the original stays exactly as it was on your disk.
Rotating PDF pages
Scanners and phones are the usual culprits behind sideways documents: feed a stack of A4 sheets the wrong way and every page lands rotated 90°, photograph a contract on a desk and the "portrait" page may well be saved as landscape. The fix sounds destructive but is not: a proper rotation does not re-render the page at all — it updates each page's orientation setting inside the PDF, so text stays razor-sharp, scans keep their full resolution, and the file size barely moves. That also means it works on any PDF, from a typeset report to a pure image scan. Rotate PDF turns every page by 90°, 180° or 270° in one pass, entirely in your browser — no install, and no upload of whatever confidential thing happens to be sideways today.
Converting between PDF and images
The two directions solve different problems. Going from PDF to images is about reuse: one page of a manual pasted into a chat, a slide dropped into a presentation, a page preview on a website, or a picture of a bank statement that some form insists on. Choose the output by content: JPG produces smaller files and suits photographic pages, while PNG is lossless and keeps text, line art and screenshots perfectly crisp at 2× resolution. PDF to JPG renders pages with a quality slider; PDF to PNG renders every page losslessly, individually or as a ZIP. One honest caveat: converting a scanned PDF to an image gives you the page as it looks — it cannot recover a cleaner original that never existed.
Going from images to PDF is about packaging: upload portals that only accept PDF, receipts bundled for an accountant, a photo set handed over as one attachment, or an archive of screenshots filed as a document. Each image becomes its own page, sized to the image, in the order you pick them. The input format decides which tool to use:
| Your images | Tool | Typical job |
|---|---|---|
| JPG or PNG | JPG to PDF | The everyday default — photos, receipts, screenshots |
| WebP | WebP to PDF | Images saved off the web |
| HEIC (iPhone) | HEIC to PDF | iPhone photo batches, portraits automatically uprighted |
| AVIF | AVIF to PDF | Modern web images a document app refuses to open |
| JPEG XL | JXL to PDF | Archived masters pulled back into a shareable document |
A detail worth knowing: modern formats like WebP, HEIC, AVIF and JPEG XL have no native place inside a PDF, so those tools decode each image and embed it as PNG — PNG embedding introduces no further lossy compression, though high-bit-depth or HDR source data is already reduced to 8-bit during decoding, and the trade-off is a possibly larger file. If size matters more than perfection, convert to JPG first and build the PDF from those.
Privacy and security
PDFs skew sensitive more than any other file type on this site. Contracts, passports and ID scans, medical letters, tax filings, payslips, client invoices — the reason a page exists as a PDF is usually that somebody considers it official, and official documents are exactly what you should hesitate to hand a stranger's server. Upload-based converters copy your file across the internet, hold it on disk you cannot see, and rely on policies you cannot enforce. The tools on this page work differently: every merge, split, deletion, rotation and conversion runs on your own device — the PDF engines are WebAssembly or JavaScript executing inside your browser tab, and your file is never transmitted anywhere. You can verify it yourself: run a job once while online so the PDF engine is fetched and cached, then keep the tab open, disconnect from the network and run another job anyway — it still works. The full reasoning, plus the one-minute self-test, is in our guide to local file processing.
All PDF tools on this site
Everything above, in one list:
- Merge PDF — combine several PDFs into one document, in your chosen order.
- Split PDF — tear a document into single-page PDFs and keep the ones you need.
- Remove PDF Pages — delete specific pages (a number, a range, or a mix) while the rest stay lossless.
- Rotate PDF — straighten sideways or upside-down pages without re-rendering them.
- PDF to JPG — render pages as compact, shareable images.
- PDF to PNG — crisp lossless page images at 2× resolution, singly or as a ZIP.
- JPG to PDF — pack JPG or PNG images into one document, one page per image.
- WebP to PDF, HEIC to PDF, AVIF to PDF, JXL to PDF — the same local assembly for modern image formats.
These pages are part of the 38 tools on this site, and they all follow the same model: choose your files, the job runs locally, you download the result — no account, no watermark, no upload, no queue on somebody's server. Missing a workflow this guide does not cover, or a result that looks wrong? Tell us — reader feedback decides what gets built and fixed next.