Evidence · first-party tested/Best AI Tools to Convert Complex PDFs into Clean Markdown with an API

Separately extracts chart content into textual summaries and value tables, including a waterfall chart and bar charts with year/value pairs and growth statistics.

✓ Worked🧾 artifact-verifiedinput + output shownTest date not recordedUpstage AI →
What was measured
Advanced Features

Provides separate table/chart extraction and flags low-confidence OCR or ambiguous regions.

context, not decisivetransformation

Separate extraction modes and OCR confidence flags are useful workflow features, but they do not by themselves determine whether the Markdown conversion is good. (3 of 3 judges)

What was given, what came back

Test input: Hybrid Earnings Report · pdf · group: hybrid-earnings-report
Input — what we sent
Input file 1 — as supplied
Input file 1 — as supplied
Input file 2 — as supplied
Target-2015-Annual-Report.pdf
Hybrid Earnings Report

A long, real-world hybrid annual report used to benchmark end-to-end PDF-to-markdown conversion. It combines native text, financial tables, charts/graphics, and scanned signature/stamp regions, stressing preservation of document structure, reading order, and embedded visual content across a multi-section report.

Why this input is hard
  • · Native digital text extraction
  • · Complex financial table preservation
  • · Chart and graphic retention
  • · Image-based signatures and stamps
  • · Reading order across a long multi-section report
  • · Markdown quality and consistency
Output — unretouched
Output 1
Output 1
Output 2
Output 2
Output 3
Output 3
Provenance
Observation
e260a099-6895-499f-ab5d-82e11a0cf513
Evidence run
6e3160de-fe46-4b45-b071-72560b5c5d0e
Study
Convert a Complex PDF into Clean Markdown with an API
Research task
86b9h7t37
Tested at
not recorded
Source
first-party
Evidence state
verified
Proof shown
input + output shown
Cost / latency
not captured
Repeat run
not captured
Tester
not captured

The last three rows are honest blanks, not placeholders — our capture has no field for them yet.

Query this
get_evidence({
  tool: "upstage-ai",
  scenario: "hybrid-earnings-report"
})
MCP · mcp.aidemos.com/api/mcp
JSON · ai.aidemos.com/v1/observations/e260a099-6895-499f-ab5d-82e11a0cf513
Free with attribution.
Same input, same check — 3 other tools
measured on Advanced Features
Landing AI✓ WorkedEmits semantic attestation blocks for handwritten-signature regions and a blurry signature stamp, distinguishing the signer/company name and the signature legibility instead of leaving those regions unannotated.Reducto✓ WorkedThe separate schema-driven extract.run endpoint cleanly recovers both a financial table and a donut chart: all requested table rows and all five donut percentages come back exactly.Tensorlake✓ WorkedProvides separate chart extraction for the SG&A waterfall, outputting chart metadata with a title, axis labels, 10 category labels, and a numeric series instead of only inline prose.
This evidence is published in
Best AI Tools to Convert Complex PDFs into Clean Markdown with an API →
Real inputs and real outputs, no retouching · every cell queryable via API & MCP · aidemos.com