PDF tools compared

What actually changes between server side and browser side processing?

The difference is where the file sits at the moment it is read. In a server side service the PDF travels over the network, is written to disk or memory on a machine that is not yours, is processed there, and the result comes back. In a browser side tool the file is read by JavaScript already loaded in the page and never exists outside your computer.

This is not a question of trusting a privacy policy. It is a question of what is technically possible. A service that never receives the file cannot store it, index it, train a model on it or hand it to a third party under a court order, because it does not have it.

What happens when you upload a file to an online service

The file is transferred over HTTPS to the provider's infrastructure. From then on you depend entirely on that company's practices: how long it keeps the file, where it keeps it (which country, which jurisdiction), who has access, and what the retention policy says. Serious providers delete after a few hours and say so. That is still a promise, not an impossibility.

What happens in a browser based tool

The page loads JavaScript libraries (in our case pdf-lib, pdf.js and JSZip) and uses the browser's own file API to read the PDF you picked. Processing runs on your own processor. The resulting file is built in memory and downloaded locally. Once the page has loaded, this works with no internet connection.

Which PDF tools are there, and what does each one cost?

List prices and tool counts read on the vendor pages themselves on 31 July 2026, in the currency each one publishes. Annual plans from the competitors are usually cheaper per month than paying monthly, and the column says so where that is the case.

The first three rows are the ones that process in the browser, and that is where the comparison that matters sits: LocalPDF and PDFLocal do the same thing we do about not uploading your file. The domain names are in the table on purpose, because several sites carry near identical names (localpdf.org, localpdf.online, local-pdf.com, pdflocal.site) with different tool counts. That way you can check exactly what we checked.

Two cells say not confirmed, and they say it on purpose. Smallpdf does not ship the price in the page source (it composes it when the page opens) and we did not count the tools in the installed PDF24 program. Adobe Acrobat online used to hold a row here and it is gone: on 31 July 2026 the Adobe pages did not answer our request, and a number we did not confirm has no place in a table whose only reason to exist is being checkable. It comes back when it is verified.

One to one comparisons, in more detail

This table puts nine services side by side and answers the broad question. If you already know who you want to compare against, there is a page per competitor, each with that vendor's numbers verified on that vendor's page, with the date:

• BestPDFInTheWorld vs iLovePDF: iLovePDF processes on its own servers and publishes "9€ Billed monthly" and "60€ Billed annually", read on 12 August 2026, plus the per task ceilings of its free plan.
• BestPDFInTheWorld vs Smallpdf: Smallpdf advertises "30 tools" and does not publish its price in the page text, and that page explains how you get it yourself.
• BestPDFInTheWorld vs Adobe Acrobat: two different product categories, and the reason we publish no Adobe price at all.

iLovePDF processes everything on its own side

This deserves its own paragraph, because iLovePDF is the service we get compared to most. Its thirty two tools run on the company's servers, without exception: the security page describes encryption protecting your data "from the moment you upload it until it's processed and delivered back to you", and choosing the region where files are processed is a paid plan feature. We searched the home, pricing and security pages for "client-side", "in your browser", "WebAssembly" and "never leave", and none of those expressions appears. That same security page says processed files are deleted within two hours, which is a good policy, and is a different thing from the file never having left your computer.

What does each free tier actually let you do?

What changes from service to service is the unit of the limit and what happens when you hit it.

• BestPDFInTheWorld: Sign PDF opens without paying, with one signature a day and files up to 10 MB. Every other tool, OCR included, is part of the Premium subscription, EUR 1.99 a month, with no daily limit and no size ceiling. No watermark on the output, with a subscription or without one.
• LocalPDF: all fifteen tools are free, OCR included, and they run in the browser. It publishes no paid plan at all; it is funded by advertising on the page. We found no published daily cap.
• PDFLocal: advertises eighty three tools, of which ten are available without paying and seventy three are marked PRO. Its paid plan page is explicit about what separates them: free output carries a PDFLocal watermark, and the one-time USD 19 payment removes the watermark and unlocks all eighty three.
• iLovePDF: the free plan gives access to the core tools and to "a limited number of documents", a number the page itself does not publish. What it does publish are per task ceilings: merging up to 25 files at a time against 500 on Premium, and 100 MB per task on merge and split against 4 GB.
• Smallpdf: the pricing page does not publish the free tier limits as a fixed number, so we do not invent them here.
• Sejda: the pricing page describes the free plan as having "page and hourly limits", "limited file uploads" and "tool specific limits". Paid plans remove them and raise the ceiling to 500 MB per file.
• PDF24: in the site's own words, all PDF24 tools can be used free of charge and without any restrictions. It monetises through advertising on the pages instead of subscriptions.

If price is the only criterion, there are free options: PDF24 and LocalPDF. But price is not the only criterion, and the next section shows what sets each offer apart.

If there are free browser based alternatives, why pay EUR 1.99 a month?

It is the right question to ask after looking at the table, and the honest answer starts with one thing: processing in the browser is not an advantage of ours, LocalPDF and PDFLocal do the same, so the comparison comes down to what each offer includes and what it costs over a year.

What EUR 1.99 a month buys, and what you can confirm without talking to us:

• The thirty-three tools with no usage cap, for one single price. There is no per tool pricing ladder: PDFLocal has ten free and seventy three PRO, and you only find out which is which by opening each one.
• No watermark anywhere. Not on the free tier, not on the paid one. In PDFLocal, whatever comes out of the ten free tools is stamped until you pay.
• A published, fixed price, EUR 1.99 per month, no annual plan, no per tool purchase, cancel whenever you want.
• OCR, text recognition on scans, in Portuguese, English and Spanish, running in your browser like everything else: the file does not leave your computer, unlike most services that offer OCR. Result quality depends on the quality of the scan.
• Every tool's limitation written on its own page. Compression rasterises, PDF to Word does not keep the layout, the signature is not qualified, the cipher is AES-128 and not AES-256. It is all written before you pay, not in the terms and conditions.
• It works with no network once the page has loaded a single time, and it exists in Portuguese, English and Spanish.

What EUR 1.99 does not buy: an API, text editing inside the PDF, AES-256, or more than thirty-three tools. If you need any of those, the table above tells you where to go, and some of them will not charge you at all.

How do I know if a site uploads my file?

You do not have to take anyone's word for it, including ours. The browser will show you. The procedure takes under a minute and works on any site:

1. Open the tool's site and press F12 (or right click and choose Inspect).
2. Go to the Network tab and clear the list.
3. Pick your PDF and run the operation.
4. Look at the size column. A POST request roughly the size of your file means the file was uploaded.

In a local tool the only requests you see are libraries and fonts, all at a fixed size independent of the PDF you chose. You can repeat the test with a 1 MB file and a 20 MB file: if outbound traffic does not change, nothing was uploaded.

When is a server based service the better choice?

Browser processing has real limits, and there are cases where a server side service is better. Said out loud:

• High volume OCR: we do text recognition on scans now, but the engine runs on your own processor. A scan of hundreds of pages takes time, and quality depends on the quality of the scan. Anyone with whole archives to recognise in one go is better served by a server side engine.
• Very large files: the ceiling becomes browser memory. A PDF of several hundred megabytes can exhaust it, especially on a phone. iLovePDF accepts up to 4 GB per task on its paid plan, and Sejda up to 500 MB per file.
• Automation through an API: there is no API. Anyone processing a thousand PDFs a night on a server needs a service that has one.
• Conversion with layout fidelity: our PDF to Word extracts text and does not preserve tables, images or columns. Commercial tools with dedicated engines do better.

If your case is none of these, and for most everyday documents it is not, what is left is this: thirty-three tools that run on your computer, with no account and with the file never leaving your machine. The test is free and takes a minute; the day you hit a tool's daily limit, you know where Premium is.

What does BestPDFInTheWorld not do?

Thirty-three tools: more than LocalPDF and than PDF24 on the web, in the same range as iLovePDF, Smallpdf and Sejda, and fewer than Stirling PDF and PDFLocal. No API. No text editing inside the PDF. No cloud storage and no history, because there is no server to store anything on. The signature is visual and is not a qualified electronic signature. Compression rasterises the pages, which shrinks the file a lot and makes the text stop being selectable.

If any of those matters to you, one of the services in the table above serves you better, and it is better to find that out now than after paying. If none of them does, the rest is here: thirty-three tools for EUR 1.99 a month, with no daily limit and no size ceiling, and Sign PDF to try without paying. You can check with the Network tab that your file never leaves your computer, before paying, or after.

Sources

• Omnibound, Generative Engine Optimization Statistics (2026)
• LocalPDF, ferramentas
• PDFLocal, ferramentas
• PDFLocal, plano pago e marca de água
• iLovePDF, planos e preços
• iLovePDF, segurança e retenção de ficheiros
• Smallpdf, planos e preços
• Sejda, planos e preços
• PDF24, ferramentas web
• PDF24 Creator, requisitos do programa
• Stirling PDF, repositório dos autores