Live spine calculator, KDP-style blank template, and full-wrap assembler for Matribhasa books — back · spine · front, print-ready. Upload your finished front & back art, then supply your own spine image (the default) or auto-generate a Style 1 — Classic spine.
1Book specs
Always required — these drive the spine width and the full-wrap dimensions in the live readout.
2Cover art
Optional: after choosing an image, drag it up/down in the preview to pick a better vertical crop for the full-wrap fit. Leave centred to keep the default.
3Spine
Your uploaded spine is fit to the spine column and overrides the render — script, logo, title, author and publisher are not needed.
Live measurements
Assemble full wrap
Single panels
Blank reference · JPG
Blank reference downloads a print-ready guide JPG (bleed, trim, safe margin) for that panel — no upload needed.