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

Reads low-clarity signer and auditor markings, but the stamp OCR is not perfect: 'LLP' is misread as '1LP'.

◐ Mixed🧾 artifact-verifiedinput + output shownTest date not recordedExtend AI →
What was measured
Text & OCR Completeness

Extracts all readable content, including scanned pages, with accurate OCR and minimal omissions.

decisive for this rankingtransformation

If the tool misses readable text or fails on scanned pages, it has not actually converted the PDF faithfully into Markdown. (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
Input file 2 — as supplied
Input file 3 — 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
dd1db974-fbae-43d1-8a89-bbbd8cf1255d
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: "extend-ai",
  scenario: "hybrid-earnings-report"
})
MCP · mcp.aidemos.com/api/mcp
JSON · ai.aidemos.com/v1/observations/dd1db974-fbae-43d1-8a89-bbbd8cf1255d
Free with attribution.
Same input, same check — 3 other tools
measured on Text & OCR Completeness
LlamaParse✓ WorkedRecovers a blurred signature stamp as readable text, showing OCR can salvage low-quality scanned text rather than dropping it entirely.Reducto✓ WorkedConverts the full 84-page native-digital annual report with no skipped pages; the output contains all 84 page-marker pairs, and checked high-risk numbers survive exactly, including the $51,550,988,273 market-value figure and 599,982,121 shares outstanding.Tensorlake◐ MixedOn a blurry Ernst & Young signoff, the OCR preserves the firm reference but makes a symbol-level mistake by rendering the ampersand as '+', so the text is close but not exact.
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