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

Breaks a 5-year financial summary table, misaligning rows, columns, and values instead of reconstructing the original structure cleanly.

✗ Failed🧾 artifact-verifiedinput + output shownTest date not recordedNutrient.io →
What was measured
Table Preservation

Preserves complex table structures, including rows, columns, multi-row headers, and merged-cell relationships in markdown.

decisive for this rankingtransformation

Accurate Markdown conversion of complex PDFs depends on keeping table structure intact, not flattening it into plain text. (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
Also checked on this input — same tool, 4 other criteria
Complex Document Handling✓ WorkedHandles an 84-page mixed-content annual report end to end, including native text, tables, charts, and scanned signature pages, and returns a markdown export.Reading Order & Structure✓ WorkedPreserves the section hierarchy and bullet-point reading order on the sample page, keeping the 'A Growth Story Again' heading tied to its paragraph and 4 bullets in sequence.Visual Content Retention✗ FailedLoses the visual semantics of the SG&A waterfall chart; the 2013–2015 rate values are present, but the chart type, axes, and legend relationships are not preserved.Visual Content Retention◐ MixedKeeps the surrounding 3-signatory signature-page text, but does not extract the handwritten signatures themselves.
Provenance
Observation
8d940f0a-8cce-4f85-9988-d75adbb9b1a8
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: "nutrient-io",
  scenario: "hybrid-earnings-report"
})
MCP · mcp.aidemos.com/api/mcp
JSON · ai.aidemos.com/v1/observations/8d940f0a-8cce-4f85-9988-d75adbb9b1a8
Free with attribution.
Same input, same check — 8 other tools
measured on Table Preservation
Adobe API◐ MixedRetains the 2-column 'Other Noncurrent Assets' table but formats the currency symbols awkwardly around the values, showing a presentation-level mismatch even though the row data remains present.Extend AI✓ WorkedPreserves a 5-year financial summary table with row labels and year columns aligned, keeping the annual financial grid intact in markdown.Landing AI✓ WorkedReconstructs a five-year financial results table with the 2015–2011 columns and aligned row/value relationships intact in markdown-style rows.LlamaParse✓ WorkedPreserves aligned rows, columns, and value associations in a standard multi-year financial summary table.Mistral AI✓ WorkedThe financial table is reconstructed into a usable structured layout without losing the relationships between headers, rows, and corresponding values.Reducto✗ FailedMis-merges two independent side-by-side lists into one table, forcing unrelated cost-of-sales and SG&A bullets into fake row pairs where no row correspondence exists in the source.Tensorlake✓ WorkedKeeps a 5-year financial summary table structured, retaining the row/column relationships across sales, expenses, EBIT, and per-share rows instead of flattening the table.Upstage AI◐ MixedReconstructs the 2011–2015 financial summary table with rows and columns intact, but misses a small number of currency symbols in the extracted values.
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