A Smallpdf alternative for merging, splitting and compressing PDFs

Where your PDF goes while it's being converted

Most online PDF tools work the same way. The file travels to the company's machine, the work happens there, and the result travels back to you. Smallpdf describes its own tools as "cloud-based" on its compress page. That isn't a criticism — it is how nearly all of them are built, and it has real advantages we'll get to later.

On Filezaar there is no upload at all: 0 bytes uploaded. The browser reads the file from your disk, does the work in the tab, and hands you a download. Nothing crosses the network. There is no copy on someone else's machine, so there is no retention window to read and nothing to delete afterwards.

Be fair about the other side of this. The upload tools do delete your file, and quickly. Smallpdf's own compress page says "we automatically delete files after one hour." One hour is a short window and a reasonable policy. The argument here isn't that they are careless with your document. The argument is narrower: for one hour, a copy of it existed on a computer you don't own, in a country you didn't choose, under a policy you can't audit. If your PDF is a lease, a medical form or a draft of something you'd rather not explain, that hour is the part you're paying for.

If your PDF is a recipe you found on a blog, none of this matters. Use whichever tool loads fastest. The full detail of what runs where is on our privacy page.

The queue: an upload converter makes you wait twice

Once a file has to travel, you pay for the trip twice — once going up, once coming back — and neither trip is the part you want.

Most home connections are asymmetric. A line advertised as "100 Mbit/s" often uploads at a tenth of that. A 180 MB scan of a signed contract is roughly two to three minutes of pure waiting on a typical uplink before the conversion even starts, and another wait on the way down. Then there's the queue itself: a server-side tool processes other people's files too, and busy periods are busy.

Here is the shape of the ordinary version of this. You have a 240-page scan at 180 MB. A submission portal closes at 5pm. You drag the file in, watch a bar fill, watch a spinner, and then watch a second bar fill on the way back. Five minutes pass. If the portal rejects the result because it's still 1 MB over the limit, you do the whole thing again.

On Filezaar nothing moves, so the only clock that runs is the work itself. A split or a merge on a document of that size is seconds. Redoing it because you picked the wrong page range costs seconds too.

The ceiling: why upload tools cap file size

Every byte an upload tool accepts costs it bandwidth in and storage out, so every one of them sets a ceiling. That's not stinginess; it's arithmetic.

What those ceilings look like varies. Convertio's own homepage states a 1 GB maximum before you're asked to sign up. Smallpdf doesn't publish an MB figure on its compress page — its FAQ says only that "usage limits may apply," and that the stronger compression levels are paid features. Both are normal.

From where you're sitting, though, the ceiling is arbitrary. Your file is the size it is. A 400-page scanned thesis with images doesn't care that a free tier stops somewhere.

Filezaar sets no cap of its own. What limits you is your own device: big files need working memory, and one browser tab can only hold so much. A phone will handle less than a laptop, and a laptop with forty tabs open will handle less than a fresh one. That's a genuine limit — it's just yours rather than a policy, and it moves when you close a few tabs.

What Filezaar does instead

Every Filezaar tool runs locally in the browser. The PDF ones:

• Merge PDF — combine documents into one, in the order you set.
• Split PDF — pull a page range out into its own file.
• Compress PDF — shrink a file that's too big for a portal or an attachment.
• PDF to images — export pages as picture files.

One file at a time, no account, no daily allowance. You can run through a folder as fast as you can add files, because there's no queue behind you. There's a fuller explanation on the how it works page.

What it doesn't do

This is the shorter list and it's worth reading before you switch:

• No editing of text inside a PDF.
• No OCR — it can't turn a scan into searchable text.
• No e-signatures.
• No saved history. Close the tab and the result is gone; there's no account to come back to.
• No batch upload of a whole folder in one go.

If you need any of those, an upload-based tool or a desktop application is the right answer, and this page should say so plainly. Filezaar is a converter, not a document suite.

It keeps working when the connection doesn't

The first time you open a tool, your browser downloads what it needs and keeps it. After that, the tools run with the connection off — on a plane, in a basement archive, on a hotel network that blocks half the internet.

That's also the simplest test of whether a converter is really local, which brings us to the next section.

How to check for yourself whether a converter uploads

Don't take any tool's word for this, ours included. There are two checks and both take under a minute.

Want step-by-step instructions for inspecting the DevTools network tab? See our 30-second verification guide.

The second test matters because "no upload" is marketing copy on some sites that upload anyway. The disconnect test is the one you can't argue with — and it's also the reason Filezaar keeps working after the wifi goes off, since there was never anything to send.

Who should stay on an upload-based tool

Honestly, quite a few people:

• Very large jobs. If you're converting two hundred files, a server with more memory than your laptop will finish while you're still dragging.
• Files bigger than your device can hold. A 6 GB video on a four-year-old phone is not a local-processing job.
• Anything needing OCR, editing or signing. Those features don't exist here.
• Locked-down work machines. Some corporate browser policies block the local processing these tools rely on. If the tool errors on a work laptop and works at home, that's why.
• When you want the result to persist. If you need to come back to a converted file next week from a different device, you want an account somewhere.

Switching: three jobs, three tools

A file that's too big for a portal. Open compress PDF, drop it in, take the result. Aim at the portal's limit, not at the smallest size available — over-compressing a text document makes it look bad for no reason.

Five PDFs that should be one. Merge PDF takes them in the order you arrange and gives you a single file.

One section of a long document. Split PDF pulls out the range you want. If you need a page as a picture rather than a page, export pages as images instead. Browse the rest of the PDF tools.

Side by side

Filezaar is not affiliated with, endorsed by, or connected to Smallpdf. Smallpdf is a trademark of its respective owner.

Competitor details above are quoted or paraphrased from smallpdf.com's own published pages and were checked on 20 September 2026; they may change.

Questions

Is a browser-based PDF tool as reliable as a server one?

For a single file, yes — the work is deterministic and it's the same maths either way. Where a server wins is headroom: it has more memory than your laptop and it won't stop because you closed a tab or the browser crashed. If you're processing one normal document, that rarely matters. If you're processing something enormous, it does.

Will this work on my phone?

Yes, on a recent version of Chrome or Safari, with nothing to install. The practical caveat is memory: phones will handle a typical PDF comfortably and may struggle with a very large scanned one. If a conversion fails on your phone, try it on a laptop before concluding anything else is wrong.

What happens if I close the tab mid-conversion?

The work stops and that's the whole story. Nothing was sent anywhere, so there's no half-finished job on a server and no account holding a partial file. Reload the page, add the file again, run it again. Your original file on disk is untouched throughout — these tools read it, they don't rewrite it.

Can my employer tell I used this?

Your network can see that you visited filezaar.com, the same way it can see any site you visit, unless you're using private DNS or a VPN. What it can't see is your file, because your file never leaves the machine. That's a real difference from an upload tool, where the transfer itself is visible in the logs as outbound traffic to a third party.

Do I need to install anything?

No. There's no extension, no desktop app, no account creation. If a site ever asks you to install something before it will convert a PDF, that's worth stopping and reading carefully.

Does compressing a PDF make the text worse?

Compressing a PDF mostly works by re-encoding the images inside it. Text and fonts are generally left alone, so the words stay sharp while photographs get softer. On a scan — which is one big image — compression does reduce visible detail. Compress a scan once, look at it, and stop there; running the same file through twice will make it noticeably worse.