The free PDF ruler online. Open any PDF and get real millimetres, inches and points. Hover for X/Y, click twice for a distance, press A to size every box. Same answer at 50% or 500%.
Same buttons as the app. Hover the page, click two points, press A, flip the units.
Measure one shape, write on the page, point at a detail, zoom in without zooming, take a step back, juggle five PDFs, or put two side by side. Every card below is live, so poke it.
Hover any box or straight line and PdfRuler outlines it. Click, and you get its exact vector size, with no points to place. It reads the PDF's own drawing instructions, so a 85 x 55 mm card says 85 x 55 mm.
Click the page and type. Choose a font, size and color, drag the note into place, and save a copy with the text written into the page. Handy for approvals, corrections and labels on a proof.
Drag on the page to draw an arrow from tail to head. Hold Shift for dead-level or 45-degree arrows. Arrows are saved as sharp vector lines, so they stay crisp at any print size.
A round lens follows your cursor and shows the page four times larger, centred where a click would land. Place points on tiny corners without zooming the whole page in and out.
Every point, line, guide, text and arrow is a step you can take back. Press Ctrl + Z to undo, Ctrl + Shift + Z to redo, or open the history list and jump straight to any step, each with its coordinates and lengths. It lives in memory only, so nothing is stored.
Open up to five PDFs at once. Each tab keeps its own page, zoom, points, guides and undo history, so you can check a whole print job in one window without losing your place.
Show a proof and its revision next to each other. Each pane has its own rulers, zoom and measurements, and whichever you click takes the toolbar. Drag the divider to give one side more room.
Rulers and readouts in millimetres, centimetres, inches, points or pixels. Pick any page corner as 0,0.
mm cm in pt pxDrop two points for length, across, down and angle. Hold Shift to lock dead level or plumb.
ShiftReads the page's drawing instructions, not pixels. A 61 x 91 mm card says 61 x 91 mm.
ACrosshair, points and guides lock onto text, lines, shapes and the page edge. Alt lets go.
AltPull a guide out of any ruler, or switch on a grid at the ruler's spacing.
dragDownload a copy with points, lines, guides and your typed text drawn on as vectors. Your original is never touched.
SHover a box or line and click to measure just that one, at its exact vector size.
PSee the media, crop, bleed, trim and art boxes a print PDF declares, each with its size.
BA 4x lens beside the cursor shows exactly where a point will land, no zooming needed.
LCtrl + Z takes back any change, Ctrl + Shift + Z brings it back, and the history list jumps to any step. Nothing is stored.
Ctrl ZOpen up to five PDFs at once. Each tab keeps its own page, zoom, points, guides and undo history.
OShow two PDFs side by side, each pane with its own rulers, zoom and measurements. Compare a proof with its revision.
VEverything is calculated in PDF points and converted at the last moment. Zoom only changes how big the sheet looks on your screen.
Pick a size to see it in every unit, drawn to scale against the A series.
Full paper size reference (A0 to A10, Letter, Legal, ANSI, envelopes) · print at actual size test sheet
Press any of these right now.
A PDF ruler puts real-world rulers (mm, cm, inches, points) around a PDF page so you can read exact sizes and positions. PdfRuler is a PDF ruler online: open a file in your browser, nothing to install.
Yes. PdfRuler at pdfruler.com is a free online PDF ruler. No account, and your PDF never leaves your device.
Yes. Press V or click the split icon to show two PDFs next to each other. Each pane has its own rulers, zoom, measurements and tabs, so you can compare a proof with its revision.
Yes, up to five, in tabs. Each tab keeps its own page, zoom, points, guides and undo history. Every file stays in your browser.
Yes. It is free, and everything runs in your browser. Your PDF is never uploaded to a server.
Yes. Everything is calculated in PDF points (1/72 inch) and converted only for display, so 50%, 100% or 400% report the same physical size.
Millimetres, centimetres, inches, points and pixels.
Open it in PdfRuler. The page width and height show in the status bar in your chosen unit. A4 reads 210 x 297 mm.
No. Saving downloads a separate copy with your points, lines and guides drawn on it as vectors.
Yes. Ctrl + Z undoes any change to points, lines and guides, Ctrl + Shift + Z (or Ctrl + Y) redoes it, and the History button next to them in the status bar lists every step so you can jump back to any of them. It is kept in memory only: nothing is stored or uploaded, and it clears when you change page or open another PDF.