PDF Page Dimensions — Size Analysis
Upload a PDF to see every page's dimensions in pt, mm, and inches — detect paper sizes, mixed sizes, and orientation.
Drop your PDF hereTap to select a file
Supports PDF, up to 500MB
How it works
- 1Drop or select a PDF file
- 2Page dimensions are read instantly in your browser using pdfjs-dist — nothing is uploaded
- 3View a per-page breakdown, switch units, and copy results as JSON or CSV
What to do next
About PDF Page Dimensions
PDF Page Dimensions performs pdf page dimensions as a focused single-page utility. Upload a PDF to see every page's dimensions in pt, mm, and inches — detect paper sizes, mixed sizes, and orientation. Defaults are tuned for the common case so the first run is one click, with every option that matters exposed for the moments you need to fine-tune the result.
Under the hood, PDF Page Dimensions uses standard browser APIs to do the actual work. The tool accepts PDF as input, with a per-file ceiling of 500 MB so memory usage stays predictable on lower-end laptops and tablets. The engine ships as part of the page bundle, so once the page is loaded the tool keeps working even if your network connection drops.
Reach for PDF Page Dimensions when you need a predictable result on a single file. The page works on the first visit, the controls are visible without a menu, and the output is delivered the moment the engine finishes.
PDF Page Dimensions is structured so the question "where is my file processed?" has a single answer: in your browser tab. The engine, the controls, and the result panel are all on one page. Navigating away or closing the tab clears the page's memory the way it does for every other tab.
The architecture imposes only the limits the browser itself imposes. The published 500 MB ceiling is conservative; most modern devices comfortably handle inputs up to that size, and the cap exists so the tool degrades gracefully on phones and budget laptops rather than running out of memory.
If your task needs more than one step, chain PDF Page Dimensions with Align Pages, Resize PDF, and Change Page Dimensions. Each tool produces output that is a clean input to the next, so multi-step workflows are just a matter of opening the next tool in a new tab and continuing.
PDF Page Dimensions sees the most use from real-estate agents bundling disclosures and HR teams handling onboarding documents, but the design is intentionally generic enough that you do not need a specialist background to get a good result. The defaults aim at the most common case so a first-time user can get the right output without changing any settings.
Output handling is intentionally boring: PDF Page Dimensions produces a single output file and triggers your browser's standard "save" behaviour. If you have a default download folder configured, that is where it will land. There is no Favtoo-side history of jobs you have run.
PDF Page Dimensions is honest about scope: it handles a single, well-defined PDF document workflow step. Specialist edge-case work — uncommon formats, very large inputs, or pipelines that need scripting — is what dedicated desktop apps are for. This page handles the common case quickly.
PDF Page Dimensions is structured around the idea that a useful tool should be its own page. Open the page, do the work, close the tab — the page is the entire product. There is no onboarding flow because there is nothing to onboard into.
Useful patterns when working with PDF Page Dimensions: keep the input file open in another tab so you can compare against the result; give the output file a descriptive name when saving so you can find it later (the default name is sensible but generic); and treat each run as independent — the tool has no concept of "history", which means you cannot accidentally pollute one job with leftovers from another.
PDF Page Dimensions runs as a regular web page, so there is no install step or permission grant before the first run. The page can be audited by viewing the source or by watching the developer-tools Network tab while a job runs.
When something goes wrong, the cause is usually one of three things: a malformed input, a browser that is out of memory, or a corporate proxy that is interfering with the page's static assets. The first two are easy to diagnose; the third typically requires asking your IT team to allow standard browser APIs to load.
That is the whole tool. Use PDF Page Dimensions for as long as it stays useful to you, and if it does, the catalog has many more tools built the same way. Each applies the same single-purpose discipline, so the way you used this page transfers to the next one you try.
How it works
- 1Open PDF Page Dimensions in your browser. The page loads quickly and the tool is ready to use the moment it becomes interactive.
- 2Drop a PDF file onto the upload area, or click to pick one from your device.
- 3Pick any non-default settings you need. Most users leave the defaults alone for the first run and only revisit if the result needs tuning.
- 4Trigger processing. standard browser APIs reads your input, applies the transformation, and writes the result back into the page.
- 5Save the output when it is ready.
- 6Repeat the process for additional inputs whenever you need to. The page stays loaded, so subsequent runs are quick.
Common use cases
- Strip blank or test pages from a scanned document using PDF Page Dimensions.
- Convert a bundle of forms into a single archival PDF.
- Combine a portfolio sample into a single application packet.
- Rotate scanned pages that came in upside-down from the office scanner.
- Compress a marketing deck so the email send-out finishes in seconds.
- Shrink a scanned report so it fits past an email gateway.
- Split a 200-page exhibit bundle into one PDF per exhibit.
- Send a polished, print-ready PDF to a client without watermarks.
- Add page numbers to a draft report before circulating it for review.
FAQ
How do I use it?
Just drop or select a PDF file — dimensions are read instantly in your browser.
Unit conversion?
Toggle between pt, mm, and inches with one click. All pages update simultaneously.
Size identification?
A0–A6, Letter, Legal, Tabloid, B4, and B5 are auto-identified. Anything else shows as Custom.
Private?
Yes — your PDF is analyzed entirely in your browser. Nothing is uploaded.
Mixed sizes?
Mixed-size pages are highlighted in amber so they stand out from the most common size.
Portrait vs Landscape?
Orientation is detected per page. The summary shows whether the document is all Portrait, all Landscape, or Mixed.
Why is my browser prompting me when I open PDF Page Dimensions?
PDF Page Dimensions only needs the standard web platform — file picker access for the inputs you choose to load, and optionally clipboard access if you copy the result rather than downloading it. There is no microphone, camera, geolocation or background-permission request, because none of those are needed for the work the tool does.
Is PDF Page Dimensions licensed for business use?
PDF Page Dimensions can be used for personal and commercial work alike — there is no separate "business" licence to purchase. The output you generate is yours to use however you want, including in client deliverables, internal documents, or commercial products. Favtoo's only ask is fair, individual use; the tool is not designed to be embedded as a backend service or wrapped behind an API for resale.
Can I call PDF Page Dimensions from a script?
PDF Page Dimensions is a browser-only tool by design and does not expose a hosted API. The reason is the same as the privacy story: there is no Favtoo backend doing the work, so there is no service to call. If you need to script the same transformation, the underlying engine (standard browser APIs) is open-source and can be used directly from your own code.
Is it safe to use PDF Page Dimensions on confidential files?
Your file is processed inside your browser by standard browser APIs. The engine reads the file's bytes from your tab's memory, computes the result, and writes the result back into the tab. You can confirm what the page does by opening developer tools and watching the Network tab during a run — the requests you see are for the tool's static assets only.
Why use PDF Page Dimensions instead of a paid online tool?
Desktop apps usually have more advanced features but require installation, maintenance and (often) a licence. Paid online tools are convenient but route your file through their servers and gate downloads behind accounts. PDF Page Dimensions sits in between: free, instant, and private, but intentionally narrow in scope. For one-off jobs and the common PDF document workflow operations, it is usually the lowest-friction choice; for highly specialised work, a dedicated app is still the right answer.
Are jobs run with PDF Page Dimensions stored anywhere?
Favtoo keeps no copy of your file because Favtoo never receives your file. PDF Page Dimensions runs entirely in your browser, the input is held only in your tab's memory, and closing the tab discards it. There is no opt-in cloud history, no "recent jobs" panel synced to an account, and no server-side retention to configure — the architecture simply has nowhere for your file to be stored.
Why did PDF Page Dimensions reject my input?
Failures usually fall into one of three buckets: the input is in an unsupported format, the input is over the size cap, or the input is structurally malformed (a truncated download, a partial export, or a stream the engine does not recognise). The first two are easy to confirm — check that your file is one of PDF and that it is below 500 MB. For the third, opening the file in its native viewer first is the fastest way to confirm the source is intact.
Does PDF Page Dimensions work on a phone or tablet?
PDF Page Dimensions runs in any modern mobile browser — Safari, Chrome, Firefox and the in-app browsers in most messaging apps all support the underlying APIs. Performance depends on the device: a recent phone handles typical inputs nearly as fast as a laptop, while older devices may take a few seconds longer near the 500 MB ceiling. The interface lays out cleanly on small screens, so you do not need to pinch-zoom to see the controls.