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

Does not retain handwritten signature content as visual output on the signatures page, leaving only partial surrounding legal text and no clearly identifiable signatures.

✗ Failed🧾 artifact-verifiedinput + output shownTest date not recordedUpstage AI →
What was measured
Visual Content Retention

Retains charts, figures, diagrams, and images in the output and places them in the correct reading position.

decisive for this rankingtransformation

For complex PDFs, figures, charts, and images are part of the document content, so preserving them in the right place is part of the core job. (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
image
Provenance
Observation
417a2325-3f7b-4e6f-a06f-e7653967e43e
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/417a2325-3f7b-4e6f-a06f-e7653967e43e
Free with attribution.
Same input, same check — 8 other tools
measured on Visual Content Retention
Adobe API✓ WorkedKeeps embedded charts and segment graphics inside the report page rather than dropping them, so the extracted page still shows the financial-highlights block and segment-sales graphics.Extend AI◐ MixedRetains charts and logos as standalone figure blocks with captions, but they are extracted out of page position rather than embedded inline.Landing AI✗ FailedReplaces a waterfall chart with text, preserving the SG&A rate values and year-to-year change labels but not the chart as a visual asset in the output.LlamaParse◐ MixedRepresents logos and signatures as textual placeholders or descriptions rather than retaining them as image assets in the output.Mistral AI✓ WorkedVisual assets are extracted into page-specific folders, keeping charts, signatures, and other document elements tied to their source pages instead of collapsing them into one consolidated output.Nutrient.io◐ MixedKeeps the surrounding 3-signatory signature-page text, but does not extract the handwritten signatures themselves.Reducto✗ FailedDoes not retain handwritten signature graphics as images: a signature crop returns only the <signature> placeholder plus the printed name/title, omitting the cursive mark itself.Tensorlake✓ WorkedRetains scanned signature-page visuals as figure blocks plus signer text, including named executives and dates, rather than dropping the signature regions from the output.
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