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Document Classification API

[ Document Classification API ]

Automate Sorting and Routing with Document Classification API

Use LlamaParse to classify complex documents reliably and send each file to the right workflow.

Classify Documents with Layout-Aware, AI-ready Parsing

LlamaParse classifies documents by understanding layout and semantics first, so invoices, statements, and forms land in the right bucket automatically. Feed it mixed PDFs and scans, and get consistent labels with confidence metadata to reduce manual review and keep pipelines reliable.

Best-in-Class Accuracy

Document Classification API for Every Industry

Startups and SaaS Platforms

Ship document-driven features (invoices, onboarding packets, contracts) without building a brittle PDF rules engine—LlamaParse classifies and parses messy uploads into clean JSON your product can rely on. Use natural-language parsing instructions to evolve categories and fields as customers change templates, so your team spends time on product, not constant extraction fixes.

Insurance Claims and Underwriting

Automatically classify FNOL packets, adjuster notes, police reports, and repair estimates, then extract tables and line items without scrambled columns or missing totals. With granular metadata and validation loops, teams can route exceptions for review with page-level traceability while keeping straight-through processing high for the rest.

Legal and Corporate Compliance

Sort and structure large sets of contracts, exhibits, and regulatory filings where headers, footnotes, and multi-column layouts typically break text-only approaches. Convert documents into citation-backed Markdown/JSON so counsel can search clauses, compare obligations, and generate compliance checklists with defensible references.

Manufacturing and Supply Chain Operations

Classify and parse purchase orders, bills of materials, packing slips, and certificates of analysis, preserving complex tables and part-number hierarchies for direct ERP ingestion. Multimodal parsing turns diagrams, charts, and spec sheets into machine-readable outputs, reducing supplier onboarding time and preventing costly data-entry errors.

The Solution

OCR Features Built for Accurate Document Classification APIs

01

Layout-Aware Page Segmentation

LlamaParse understands real document structure—headers, footers, multi-column flows, sections, and nested blocks—instead of dumping a flat text stream. For a Document Classification API, that means you can classify based on stable semantic regions (like “Terms”, “Invoice Summary”, or “Patient Info”) even when templates and layouts vary.

02

JSON Output for Classification

Return AI-ready JSON with cleanly separated elements (sections, paragraphs, tables) rather than forcing your classifier to re-parse messy text. This makes it straightforward to build a deterministic classification API that maps documents into your label taxonomy with consistent fields across inputs.

03

Verifiable Metadata & Citations

Every extracted element can include page-level traceability (page numbers and spatial coordinates) plus confidence signals, so you can audit what evidence drove a label. In a classification endpoint, that enables explainable results, targeted human review for low-confidence cases, and easier debugging when customers dispute a category.

04

Multimodal Visual Understanding

LlamaParse can interpret charts, images, and tables as part of the document’s meaning, not just as ignored pixels. That’s critical for classification when the “type” of document is signaled by visual artifacts (e.g., statement tables, claim forms, lab result graphs) rather than a single keyword.

Technical OCR documentation

Agentic OCR, documented for builders.

Explore our developer guides to easily connect your document pipelines to LlamaParse.

Explore the documentation

Eliminate Human Error

Our AI catches the typos that tired eyes miss.

Format Flexibility

Export to Excel, JSON, XML, or directly via API.

Enterprise-Grade Security

SOC2 Type II compliant with end-to-end encryption.

No-Code Templates

Train the tool on your specific forms in minutes, not days.

Lightning Speed

Average processing time of <3 seconds per page.

LlamaParse’s support of a wide variety of filetypes and its accuracy of parsing made it the best tool we tested in our evaluations. The LlamaIndex team was very responsive and we were off to the races within a day.

Satwik Singh

Lead Engineer at 11x

Trusted by 1,200+ data-driven companies

Turn data chaos into data clarity.

Parse your documents free. 10,000 credits to start.

Common FAQs

How Does it Work?

01

How does the API handle different templates and multi-column layouts without breaking classification?

The API performs layout-aware page segmentation, identifying stable regions like headers, footers, sections, and multi-column flows. That means you can classify based on consistent semantic areas (e.g., “Invoice Summary” or “Patient Info”) even when formats vary across vendors or versions.

02

What does the API return—raw text, or something my classifier can reliably consume?

You get AI-ready JSON with cleanly separated sections, paragraphs, and tables instead of a single flat text blob. This makes it easy to map documents into your label taxonomy using consistent fields and reduces downstream parsing and edge-case handling.

03

Can I explain why a document was labeled a certain way?

Yes—extracted elements can include verifiable metadata like page numbers, spatial coordinates, and confidence signals. This gives you auditable evidence for each label, supports targeted human review for low-confidence cases, and speeds up debugging when a classification is disputed.

04

Will the API understand documents where the key signal is visual (tables, charts, forms) rather than keywords?

It uses multimodal visual understanding to interpret tables, charts, images, and form structure as part of the document’s meaning. That’s especially useful for distinguishing document types that look different even when the text is similar, such as statements, claim forms, and lab reports.

05

How do you reduce errors and keep results consistent as our document mix changes over time?

By classifying from structured, layout-grounded regions rather than brittle keyword matches, the system stays stable across new templates and minor formatting shifts. You can also use confidence signals and citations to continuously audit outcomes and tighten your review workflow where it matters.

06

How quickly can we integrate this into an existing classification pipeline?

Most teams plug it in as a preprocessing step: send a document, receive structured JSON plus traceability, then run your rules or ML model on predictable fields. This approach typically shortens implementation time because you spend less effort cleaning text and handling layout-specific exceptions.

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