Everything Your PDFs Need, Checked Automatically

500+ rule-based checks + 91 PDF/X-4 conformance checks (ISO 15930-7) powered by a deterministic engine, plus 32 AI-powered inspections for content quality, regulatory compliance, and brand verification.

Three ways to run

LintPDF processes jobs in one of three modes. Pick per-request — mix and match across your workflow.

Engine

Run our 500+ checks

Full analyzer pipeline — fonts, color, images, transparency, packaging geometry, barcode grading, PDF/X + PDF/A compliance. Separations, TAC, font and image catalogues all shipped in the viewer.

External Import

Bring your own preflight

Already running PitStop, callas pdfToolbox, or Adobe Acrobat Preflight? Submit the PDF plus the XML/JSON report. LintPDF parses the findings and renders them in the viewer with full geometry — no re-checking cost.

Hosted Web Viewer

Every job — engine, external import, or minimal — opens in the same production-grade viewer. Share links are tokenized, branded, and stream from Cloudflare R2 edge caches.

Separations & ink channels

Toggle process (CMYK) and spot channels per page. Isolate single inks, inspect overprint behaviour, verify plate counts.

TAC heatmap + densitometer

Total Area Coverage overlay flags ink-limit violations. Click any pixel to read the densitometer across every separation.

Layers & optional content

PDF optional-content groups render as toggleable layers. Dieline, white ink, and varnish each get their own visibility switch.

File comparison

Diff two revisions side-by-side with SSIM heatmaps. Catch moved elements, color shifts, font substitutions before they ship.

Branded & anonymous share links

Every job mints a tokenized URL with your logo and colors — or strip all branding including PDF metadata with one flag.

Cloudflare R2 edge caching

Page tiles are pre-warmed into Cloudflare R2 on ingest. Reviewers load from the closest edge, no cold-render waits.

Anonymous output for brokers & distributors

Flip a tenant default or pass brand=anonymous per submission to strip every trace of LintPDF and tenant branding from reports, viewers, and share links. PDF metadata is sanitized, the filename becomes preflight-<id>.pdf, and share links freeze that anonymity at mint time — flipping the setting later won't retroactively rebrand already-sent links. Ideal for agencies and brokers who hand reports to end-distributors without exposing their supply chain.

Core Engine

500+ rule-based checks plus a 91-check PDF/X-4 conformance suite (ISO 15930-7) that run on every file. Deterministic, fast, and thorough. Resolution, fonts, colors, transparency, bleeds, barcodes, packaging geometry, artwork comparison, compliance, and more. Included on all plans with no per-check fees.

Font Integrity

Embedding, subsetting, Type 3 detection, encoding mismatches, simulated bold/italic — every font issue that causes RIP failures.

Color Spaces

RGB in CMYK workflows, spot color detection, ICC profile validation, overprint conflicts, and total ink coverage thresholds.

Placement-Aware Image Resolution

Checks effective DPI for every image using its actual rendered size — not the PDF's declared resolution. Catches images that look fine at 300 DPI but print blurry because they've been scaled up. LPDF_IMG_001 (effective DPI below minimum) and LPDF_IMG_006 (upscaled >200%) use real placement geometry.

Transparency & Blend Modes

Transparency effects, non-standard blend modes, soft masks, and gradient transparency detection across all pages.

Page Geometry & Bleeds

TrimBox validation, bleed sufficiency, page size matching, content outside trim detection. Every box the printer needs.

PDF/X & PDF/A Compliance

PDF/X-1a, PDF/X-3, PDF/X-4 (ISO 15930) and PDF/A archival conformance. JavaScript, encryption, and prohibited feature detection.

Barcode Grading

ISO 15416/15415 barcode grading for 1D and 2D codes, quiet zone validation, DPI checks, decode verification, and non-compliant color detection.

Overprint & Ink

Overprint settings validation, ink coverage calculations per page, spot color usage tracking, and total area coverage limits.

AI Inspections

Invite-Only Alpha

32 AI-powered inspections across 14 categories. Computer vision, NLP, and machine learning models that catch what deterministic rules cannot. Metered with credits, available on all paid plans.

Barcode Detection

AI-powered barcode and QR code analysis beyond ISO grading — type identification, decode verification, placement, and content matching.

Barcode Decode — 1 credit
QR Validation — 1 credit
Barcode Dimensions — 1 credit
Pharma Serialization — 1 credit
Barcode Content — 1 credit
QR Human Readable — 1 credit
Barcode+QR Content Match — 1 credit

Content Quality

Text-level analysis for spelling, language, and duplicate detection across submitted files.

Spell Check — 1 credit
Language Detection — 1 credit
Duplicate Detection — 1 credit

File Comparison

Visual and structural diff between file versions to catch unintended changes.

Version Diff — 1 credit

Color Compliance

Brand palette enforcement and accessibility contrast validation.

Brand Palette Check — 1 credit
WCAG Contrast — 1 credit

Trend Analysis

Aggregate findings across submissions to identify recurring issues.

Submission Quality SPC — 1 credit

Dieline Detection

Detect and validate dieline layers in packaging artwork.

Dieline by Name — 1 credit

Regulatory Compliance

Automated compliance validation for FDA, EU FIR, GHS/CLP, and pharmaceutical labeling requirements.

FDA Nutrition Facts — 1 credit
EU FIR 1169/2011 — 1 credit
GHS CLP 1272/2008 — 1 credit
Pharma Font Compliance — 1 credit

Image Analysis

Computer vision for image quality assessment and content safety screening.

Image Quality — 2 credits
NSFW Detection — 2 credits
Image Similarity — 2 credits

Document Classification

Automatic document type classification and Ruleset suggestion.

File Classification — 2 credits
Auto Preflight Profile — 2 credits

Logo Verification

Compare detected logos against brand reference files for accuracy.

Logo Detection — 2 credits

Spatial Analysis

Visual analysis of content placement relative to trim, fold, and safety zones.

Safe Zone Violations — 2 credits

NLP Interfaces

Natural language interfaces for querying and interpreting preflight data.

NL Preflight Profile — 2 credits
NL Report Interpret — 2 credits

Text Analysis

Advanced text content analysis including translation and outline detection.

Multi-Language Translation — 2 credits
Text as Outlines — 2 credits

Symbol Detection

Identify and validate regulatory symbols, recycling marks, and certification logos.

Regulatory Symbols — 2 credits
Processing Steps Fallback — 2 credits

AI Presets

Pre-configured inspection bundles for common use cases. Select a preset in your submit request or build custom combinations in your Ruleset.

fda-food-label

FDA Food Label

21 CFR 101.9 nutrition panel validation, barcode checks, and content quality for US food packaging.

Est. 8-14 credits per file

eu-food-label

EU Food Label

Regulation 1169/2011 compliance including allergen emphasis, x-height, and nutritional declarations.

Est. 8-14 credits per file

pharma-eu

Pharma EU

EU FMD serialization, Braille placeholder, font compliance, and pharmaceutical barcode validation.

Est. 8-14 credits per file

ghs-chemical

GHS Chemical

CLP 1272/2008 pictogram detection, signal words, H/P statements, and hazard communication compliance.

Est. 8-12 credits per file

packaging-qc

Packaging QC

Barcode grading, dieline detection, safe zone validation, image quality, and content checks for general packaging.

Est. 12-20 credits per file

brand-compliance

Brand Compliance

Logo verification, brand palette enforcement, WCAG contrast, and spell checking for brand consistency.

Est. 8-14 credits per file

full-ai-scan

Full AI Scan

Run all 32 AI inspections across every category. Maximum coverage for comprehensive preflight.

Est. 45-55 credits per file

Text Tier

1 credit · Sub-second latency · Text & structure analysis

Vision Tier

2 credits · 1-5s latency · Vision & ML models