Built by prepress veterans
LoupePDF exists because the print industry got stuck choosing between Acrobat plug-ins and proprietary monoliths. We built the viewer prepress operators actually want, embeddable anywhere, AGPL-3.0-licensed.
Think Neverland
LoupePDF is built by Think Neverland, a product studio focused on developer tools for the print and publishing industry. Every web-to-print platform, every MIS, every preflight tool eventually needs a viewer. The choices today are bad: a giant proprietary library, a basic raster previewer, or paying Acrobat by the seat.
LoupePDF is the third option. A first-class prepress viewer that runs in any browser, surfaces ink separations and TAC, supports layer toggles and annotation overlays, and drops into your stack as an embed or an iframe. No plug-ins, no per-seat licenses, no vendor lock-in.
Composable by design
LoupePDF doesn't try to be your preflight tool, your MIS, or your job board. It's a viewer — it shows the PDF accurately and gets out of your way.
Plugin slots cover the integration surface: custom toolbars, panels, hotkeys, and overlay layers. Bring your own preflight verdicts (LintPDF, PitStop, callas, Acrobat — anything that emits findings), brand specs, or job-board context. The viewer stays composable; the host stays in charge.
What you don't get: a half-finished editor, a forced sign-up flow, or hidden telemetry. What you do get: a viewer that respects your stack and your customers.
Open standards commitment
LoupePDF renders against the same standards every prepress professional already knows. We don't invent — we implement.
ISO 32000-2
The PDF 2.0 specification. LoupePDF renders every version through 2.0 with full transparency-blend support.
DeviceN + Spot
Per-channel rendering for CMYK, hexachrome, and spot-color workflows — including overprint preview semantics.
Optional Content
PDF Optional Content Groups (layers) toggle natively — dieline, white ink, varnish, braille, all as first-class layer entries.
PDF Annotations
Standard PDF markup annotations render and round-trip cleanly, alongside any custom overlay layers your host plugs in.
See what LoupePDF can render
Per-channel separations, TAC heatmap, layer toggles, annotation overlays — all in any browser, embeddable in any host.
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