ExtractFoxPDF to JSON converter — structured export
PDF to JSON converter that returns the data itself — not positional text fragments. Drop a PDF, pick a template or describe the schema, and get JSON with numbers as numbers, dates as ISO strings, and arrays for line items.
What should we pull from this pdf?
Or pick specific fields
Or describe it yourself
Why this matters
Most PDF-to-JSON converters return a tree of text positions and font info — useless to anyone who actually wants the data. ExtractFox returns the data itself: fields the way you'd model them in your own application, ready to insert into a database or pipe to an LLM. ETL pipelines that call pdfplumber get back a mess of text spans with x/y coordinates — someone still has to write heuristics to find invoice totals buried on page 3. LLM workflows feeding document chunks as flat strings lose the structure that makes RAG useful: you can't query line_items[3].amount when every PDF becomes one unstructured blob.
How it works
- Step 1Upload your PDF
Native, scanned, image-based, multi-page — all work.
- Step 2Pick a template or describe the schema
Use a prebuilt schema (invoice, statement, contract) or describe the fields in plain English. ExtractFox infers the JSON shape and returns it stably.
- Step 3Download or POST to your API
Download as .json, or hit the REST API to wire extraction into your backend.
Common use cases
Sample output
Example: invoice extracted as JSON
| vendor | Acme Supplies Ltd. |
| invoice_number | INV-00284 |
| issue_date | 2026-04-12 |
| due_date | 2026-05-12 |
| currency | USD |
| subtotal | 232 |
| tax | 46.4 |
| total | 278.4 |
| description | quantity | unit_price | amount |
|---|---|---|---|
| A4 paper, 80gsm, 500 sheets | 12 | 4.5 | 54 |
| Toner cartridge, black | 2 | 89 | 178 |
Frequently asked questions
How do I extract structured JSON from a PDF?+
Upload the PDF here, choose a template or describe the schema you want, and download the JSON. Numbers come through as numbers, dates as ISO strings, lists as arrays.
Is the JSON schema stable across runs?+
Yes. Within a given template (or a given description), field names and types are stable, so you can write code against the output and trust it across documents.
Can I provide my own schema?+
On the paid plan, you can POST a JSON Schema (or Zod schema in TypeScript) along with the PDF, and the response will conform to it.
How is this different from pdf.js or pdfplumber JSON output?+
Those libraries return positional text and layout metadata — useful if you're building a viewer, useless if you want the data. ExtractFox returns the data itself, in the shape you'd model it in your application.
Can I get one JSON object per PDF, or one row per record?+
Both. By default you get one object per PDF, with arrays inside for repeating records. For batch processing many PDFs (one row per file), wrap multiple calls and concatenate the results.
Can I nest arrays inside the JSON — e.g., line items under an invoice header?+
Yes. Repeating records come back as arrays nested under the document-level fields — line_items[], transactions[], clauses[]. Numbers are numbers, dates are ISO strings.
Does the JSON handle Unicode and special characters in field values?+
Yes. Output is valid UTF-8 JSON with proper escaping for quotes, newlines, and non-ASCII characters. Vendor names in Cyrillic or CJK import cleanly into Postgres and MongoDB.
How do I convert PDF to JSON?+
Upload the PDF here, choose a prebuilt schema (invoice, bank statement, contract) or describe the fields you want, then download .json. One object per document with nested arrays for repeating rows.
Is there a PDF to JSON API?+
Yes — POST to /api/extract on a paid plan with mode=custom or a prebuilt schemaId. See /developers for auth; this page is the free browser converter.
How does this compare to PDF to JSON in Python (pdfplumber)?+
pdfplumber returns text spans and coordinates — you still write heuristics to find fields. This converter returns application-ready JSON: vendor, line_items[], totals — the shape you'd model in your own code, not a layout tree to parse.
Is this a free PDF to JSON converter?+
Yes — convert PDF to JSON free in the browser with no signup for your first extraction. Download the .json file or upgrade for API access and higher monthly volume.