A graph paper generator that builds printable grids exactly the way you want them and exports a crisp vector PDF — plus PNG and SVG. Pick from six paper styles (square grid, dot grid, isometric, hexagonal, ruled lines and semi-log), set the spacing in millimetres, centimetres or inches, choose your page size, recolour the lines, and watch the live preview redraw instantly. It is built for students, engineers, architects, bullet-journallers, game designers and anyone who would rather print the perfect sheet than hunt for the right pad.
The big advantage over a stock PDF download is control. Off-the-shelf graph paper comes in whatever spacing the publisher chose; here you decide everything — 4 mm engineering squares, 1/4-inch quad paper, a soft grey 5 mm dot grid for journaling, a 10 mm hex map for a dungeon, or a true semi-log sheet for a physics plot. Because the output is vector, the lines stay razor-sharp no matter how large you print, and the geometry is computed at real page dimensions so what you measure on screen matches what comes out of the printer.
How it works
Every style is generated as vector geometry in PostScript points (1 point = 1/72 inch), the same unit PDFs use internally. When you set a 5 mm spacing the tool converts that to points (5 mm × 72 ÷ 25.4 ≈ 14.17 pt) and steps a line or dot across the printable area, which is the full page minus your chosen margin. Square and ruled styles lay down horizontal and vertical lines; the dot style places a filled circle at each intersection; isometric draws vertical lines plus two 30-degree diagonal families clipped to the page with a Cohen–Sutherland clipper; hex tessellates pointy-top hexagons; and semi-log spaces the vertical lines logarithmically so each decade is divided at log10 of 2 through 9.
The same geometry feeds three exporters. The PDF is drawn line-by-line with jsPDF at exact scale, so it prints true-to-size. The SVG wraps the identical paths in a standalone file you can edit in any vector editor. The PNG rasterises that SVG onto a canvas at roughly 144 DPI for pasting into documents. A “major line every N squares” option draws a heavier accent line on the count you choose, and separate colour pickers let you set minor, major and background tones.
Example
Suppose you want classic engineering paper: choose Square grid, page A4 portrait, unit mm, spacing 5, and major line every 2 so a darker line lands every centimetre. Set the minor colour to a pale blue and the major colour to a stronger blue, nudge the line weight to 0.5 pt and add an 8 mm margin. Hit Download PDF and you get a true 5 mm grid with a 10 mm accent grid, ready to print at 100%. Switch the style to Dot grid, lift the dot size slightly, recolour to soft grey, and the same page becomes a tidy bullet-journal sheet. Flip to Isometric at 6 mm for 3D product sketches, or Hexagonal at 12 mm for a tabletop map — all without leaving the page or uploading a single byte.