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doc2mark

Name: doc2mark
Availability: InStock
Author: AI Demos

Open-source PDF-to-markdown that preserves native text and headings, but still struggles with tables, charts, images, and scans.

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Open sourceNative textTables degradedScans unsupported

TL;DR — our verdictUpdated July 2026 · 17 test artifacts

Good text baseline, weak structure handling

Where it wins

You need an open-source, self-hostable baseline for native-digital PDFs.
Your documents are prose-heavy and section headings matter more than table fidelity.
You can manually clean up tables, charts, and dropped images after conversion.

Main limitation

You need faithful complex table reconstruction.

Pricing (verified plans)

Open source $0

Strongest test artifacts

PDF-to-Markdown Conversion →

Our take

doc2mark is a solid open-source baseline for native-digital PDFs: it reliably extracts prose and major headings from long reports, including the 84-page hybrid filing and the 18-page financial report. But the tested outputs still break dense tables, fragment charts, drop images and signatures, jumble multi-column reading order, and fail outright on scans unless you add an external OCR/API path.

Walkthrough of doc2mark on the table-heavy financial-report input.

In-Depth Review

Our detailed analysis of doc2mark — features, performance, and real-world testing.

AI Demos Team

Expert Reviewer

Verified Review

Feature-by-Feature Breakdown

PDF-to-Markdown Conversion

Weak

▾

Test Summary

Feature tested: PDF-to-Markdown Conversion

Result: Failed — Weak

Feature tested: PDF-to-Markdown Conversion

Result: Failed

Verdict: Weak

Expected behavior: Converts digitally born and scanned PDF documents into extractable markdown/text, as exercised on the Target annual report, Japanese quarterly report, hybrid earnings report, multi-column spread, the A Growth Story Again page, and a scanned research paper. The proof points cover native text, reading order, tables, charts, embedded images, footnotes, and long-document completion.

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input1_hybridearnings_general_section.png

Observed output: Output artifact (Image): The full business paragraph survived, including the Target Corporation description and credit-card segment history. — doc2mark_input1_hybridearnings_general_section_parsed_failed.png

Input artifact: Input artifact (Image): Input — doc2mark_input1_hybridearnings_general_section.png

Output artifact: Output artifact (Image): The full business paragraph survived, including the Target Corporation description and credit-card segment history. — doc2mark_input1_hybridearnings_general_section_parsed_failed.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input2_financialpdf_disclaimer_text.png

Observed output: Output artifact (Image): The disclaimer paragraph was fully preserved, including the Japanese GAAP note, translation note, forward-looking caveat, and rounding convention. — doc2mark_input2_financialpdf_disclaimer_text_parsed_success.png

Input artifact: Input artifact (Image): Input — doc2mark_input2_financialpdf_disclaimer_text.png

Output artifact: Output artifact (Image): The disclaimer paragraph was fully preserved, including the Japanese GAAP note, translation note, forward-looking caveat, and rounding convention. — doc2mark_input2_financialpdf_disclaimer_text_parsed_success.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input1_hybridearnings_item_1_section.png

Observed output: Output artifact (Image): The Item 1 / Business heading was recognized as a Markdown-style header before the section text continued. — doc2mark_input1_hybridearnings_item_1_header_parsed_success.png

Input artifact: Input artifact (Image): Input — doc2mark_input1_hybridearnings_item_1_section.png

Output artifact: Output artifact (Image): The Item 1 / Business heading was recognized as a Markdown-style header before the section text continued. — doc2mark_input1_hybridearnings_item_1_header_parsed_success.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Japanese report section headed Changes to Accounting Policies. — doc2mark_input2_financialpdf_changes_header.png

Observed output: Output artifact (Image): The section title is present, but the heading formatting is inconsistent rather than cleanly normalized. — doc2mark_input2_financialpdf_changes_header_parsed_failed.png

Input artifact: Input artifact (Image): Japanese report section headed Changes to Accounting Policies. — doc2mark_input2_financialpdf_changes_header.png

Output artifact: Output artifact (Image): The section title is present, but the heading formatting is inconsistent rather than cleanly normalized. — doc2mark_input2_financialpdf_changes_header_parsed_failed.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input2_financialpdf_toc.png

Observed output: Output artifact (Image): The table of contents kept its section ordering and hierarchy, showing that simple linear pages can stay in sequence. — doc2mark_input2_financialpdf_toc_parsed_failed.png

Input artifact: Input artifact (Image): Input — doc2mark_input2_financialpdf_toc.png

Output artifact: Output artifact (Image): The table of contents kept its section ordering and hierarchy, showing that simple linear pages can stay in sequence. — doc2mark_input2_financialpdf_toc_parsed_failed.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input1_hybridearnings_financial_table.png

Observed output: Output artifact (Image): The annual-report financial summary was flattened into plain text with row-to-column mapping damaged. — doc2mark_input1_hybridearnings_financial_table_parsed_failed.png

Input artifact: Input artifact (Image): Input — doc2mark_input1_hybridearnings_financial_table.png

Output artifact: Output artifact (Image): The annual-report financial summary was flattened into plain text with row-to-column mapping damaged. — doc2mark_input1_hybridearnings_financial_table_parsed_failed.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input2_financialpdf_business_results_table.png

Observed output: Output artifact (Image): The quarterly business-results table merged the numeric columns into the first cell, breaking the row-to-column mapping. — doc2mark_input2_financialpdf_business_results_table_parsed_failed.png

Input artifact: Input artifact (Image): Input — doc2mark_input2_financialpdf_business_results_table.png

Output artifact: Output artifact (Image): The quarterly business-results table merged the numeric columns into the first cell, breaking the row-to-column mapping. — doc2mark_input2_financialpdf_business_results_table_parsed_failed.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input2_financialpdf_corporate_info_table_bonus_criterion.png

Observed output: Output artifact (Image): A simple corporate-info table was emitted as Markdown, showing that the output syntax changes from table to table. — doc2mark_input2_corporate_info_table_parsed_md_format.png

Input artifact: Input artifact (Image): Input — doc2mark_input2_financialpdf_corporate_info_table_bonus_criterion.png

Output artifact: Output artifact (Image): A simple corporate-info table was emitted as Markdown, showing that the output syntax changes from table to table. — doc2mark_input2_corporate_info_table_parsed_md_format.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input2_financialpdf_quarterly_table_bonus_criterion.png

Observed output: Output artifact (Image): Another table from the same document was emitted as HTML, confirming inconsistent table syntax across pages. — doc2mark_input2_financialpdf_quarterly_table_bonus_parsed_html_format.png

Input artifact: Input artifact (Image): Input — doc2mark_input2_financialpdf_quarterly_table_bonus_criterion.png

Output artifact: Output artifact (Image): Another table from the same document was emitted as HTML, confirming inconsistent table syntax across pages. — doc2mark_input2_financialpdf_quarterly_table_bonus_parsed_html_format.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input1_hybridearnings_financial_charts.png

Observed output: Output artifact (Image): The four chart panels were fragmented into labels, scattered values, and a broken HTML table, making the trend data unusable. — doc2mark_input1_hybridearnings_financial_charts_parsed_failed.png

Input artifact: Input artifact (Image): Input — doc2mark_input1_hybridearnings_financial_charts.png

Output artifact: Output artifact (Image): The four chart panels were fragmented into labels, scattered values, and a broken HTML table, making the trend data unusable. — doc2mark_input1_hybridearnings_financial_charts_parsed_failed.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input1_hybridearnings_logo.png

Observed output: Output artifact (Image): The Target logo was dropped; only the report title text remained. — doc2mark_input1_hybridearnings_logo_parsed_failed.png

Input artifact: Input artifact (Image): Input — doc2mark_input1_hybridearnings_logo.png

Output artifact: Output artifact (Image): The Target logo was dropped; only the report title text remained. — doc2mark_input1_hybridearnings_logo_parsed_failed.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input1_hybridearnings_ceo_sign.png

Observed output: Output artifact (Image): The handwritten signature image was omitted, leaving only the printed Brian Cornell signature line. — doc2mark_input1_hybridearnings_ceo_sign_parsed_failed.png

Input artifact: Input artifact (Image): Input — doc2mark_input1_hybridearnings_ceo_sign.png

Output artifact: Output artifact (Image): The handwritten signature image was omitted, leaving only the printed Brian Cornell signature line. — doc2mark_input1_hybridearnings_ceo_sign_parsed_failed.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input1_hybridearnings_growth_section.png

Observed output: Output artifact (Image): The multi-column growth page was flattened into interleaved paragraphs and bullets, so the intended column reading order was broken. — doc2mark_input1_hybridearnings_growth_section_parsed_failed.png

Input artifact: Input artifact (Image): Input — doc2mark_input1_hybridearnings_growth_section.png

Output artifact: Output artifact (Image): The multi-column growth page was flattened into interleaved paragraphs and bullets, so the intended column reading order was broken. — doc2mark_input1_hybridearnings_growth_section_parsed_failed.png

What changed: Image transformed into Image

Test case: Image → Image

Input type: Image

Input used: Input artifact (Image): Input — doc2mark_input1_hybridearnings_footnotes.png

Observed output: Output artifact (Image): The table footnotes were extracted as a separate block of condensed text rather than staying attached to the table. — doc2mark_input1_hybridearnings_footnotes_parsed_failed.png

Input artifact: Input artifact (Image): Input — doc2mark_input1_hybridearnings_footnotes.png

Output artifact: Output artifact (Image): The table footnotes were extracted as a separate block of condensed text rather than staying attached to the table. — doc2mark_input1_hybridearnings_footnotes_parsed_failed.png

What changed: Image transformed into Image

Test case: PDF document → Text/code file

Input type: PDF document

Input used: Input artifact (PDF document): Scanned research paper used as the OCR test case. — input3_scannedpaper.pdf

Observed output: Output artifact (Text/code file): No markdown output was produced; the result file is 0 bytes, so the scanned document path is not usable in this open-source-only setup. — doc2mark_input3_scannedpaper_output.md

Input artifact: Input artifact (PDF document): Scanned research paper used as the OCR test case. — input3_scannedpaper.pdf

Output artifact: Output artifact (Text/code file): No markdown output was produced; the result file is 0 bytes, so the scanned document path is not usable in this open-source-only setup. — doc2mark_input3_scannedpaper_output.md

What changed: PDF document transformed into Text/code file

Test case: PDF document → Text/code file

Input type: PDF document

Input used: Input artifact (PDF document): Input — input1_hybridearnings.pdf

Observed output: Output artifact (Text/code file): The 84-page hybrid earnings report completed in 29 seconds without truncation or a crash, although formatting errors persisted throughout the file. — doc2mark_input1_hybridearnings_output.md

Input artifact: Input artifact (PDF document): Input — input1_hybridearnings.pdf

Output artifact: Output artifact (Text/code file): The 84-page hybrid earnings report completed in 29 seconds without truncation or a crash, although formatting errors persisted throughout the file. — doc2mark_input1_hybridearnings_output.md

What changed: PDF document transformed into Text/code file

Test case: PDF document → Text/code file

Input type: PDF document

Input used: Input artifact (PDF document): Input — input2_financialpdf.pdf

Observed output: Output artifact (Text/code file): The 18-page financial report completed in 15 seconds with complete text extraction, but table formatting stayed inconsistent. — doc2mark_input2_financialpdf_output.md

Input artifact: Input artifact (PDF document): Input — input2_financialpdf.pdf

Output artifact: Output artifact (Text/code file): The 18-page financial report completed in 15 seconds with complete text extraction, but table formatting stayed inconsistent. — doc2mark_input2_financialpdf_output.md

What changed: PDF document transformed into Text/code file

Why it matters / Conclusion: The footnotes survive as text, but they are no longer tightly linked to the table they explain.

Converts digitally born and scanned PDF documents into extractable markdown/text, as exercised on the Target annual report, Japanese quarterly report, hybrid earnings report, multi-column spread, the A Growth Story Again page, and a scanned research paper. The proof points cover native text, reading order, tables, charts, embedded images, footnotes, and long-document completion.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input1_hybridearnings_general_section.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: The full business paragraph survived, including the Target Corporation description and credit-card segment history., doc2mark_input1_hybridearnings_general_section_parsed_failed.png

The full business paragraph survived, including the Target Corporation description and credit-card segment history.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input2_financialpdf_disclaimer_text.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: The disclaimer paragraph was fully preserved, including the Japanese GAAP note, translation note, forward-looking caveat, and rounding convention., doc2mark_input2_financialpdf_disclaimer_text_parsed_success.png

The disclaimer paragraph was fully preserved, including the Japanese GAAP note, translation note, forward-looking caveat, and rounding convention.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input1_hybridearnings_item_1_section.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: The Item 1 / Business heading was recognized as a Markdown-style header before the section text continued., doc2mark_input1_hybridearnings_item_1_header_parsed_success.png

The Item 1 / Business heading was recognized as a Markdown-style header before the section text continued.

image

Japanese report section headed Changes to Accounting Policies.

↓→

image

Output artifact for "PDF-to-Markdown Conversion" test: The section title is present, but the heading formatting is inconsistent rather than cleanly normalized., doc2mark_input2_financialpdf_changes_header_parsed_failed.png

The section title is present, but the heading formatting is inconsistent rather than cleanly normalized.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input2_financialpdf_toc.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: The table of contents kept its section ordering and hierarchy, showing that simple linear pages can stay in sequence., doc2mark_input2_financialpdf_toc_parsed_failed.png

The table of contents kept its section ordering and hierarchy, showing that simple linear pages can stay in sequence.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input1_hybridearnings_financial_table.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: The annual-report financial summary was flattened into plain text with row-to-column mapping damaged., doc2mark_input1_hybridearnings_financial_table_parsed_failed.png

The annual-report financial summary was flattened into plain text with row-to-column mapping damaged.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input2_financialpdf_business_results_table.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: The quarterly business-results table merged the numeric columns into the first cell, breaking the row-to-column mapping., doc2mark_input2_financialpdf_business_results_table_parsed_failed.png

The quarterly business-results table merged the numeric columns into the first cell, breaking the row-to-column mapping.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input2_financialpdf_corporate_info_table_bonus_criterion.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: A simple corporate-info table was emitted as Markdown, showing that the output syntax changes from table to table., doc2mark_input2_corporate_info_table_parsed_md_format.png

A simple corporate-info table was emitted as Markdown, showing that the output syntax changes from table to table.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input2_financialpdf_quarterly_table_bonus_criterion.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: Another table from the same document was emitted as HTML, confirming inconsistent table syntax across pages., doc2mark_input2_financialpdf_quarterly_table_bonus_parsed_html_format.png

Another table from the same document was emitted as HTML, confirming inconsistent table syntax across pages.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input1_hybridearnings_financial_charts.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: The four chart panels were fragmented into labels, scattered values, and a broken HTML table, making the trend data unusable., doc2mark_input1_hybridearnings_financial_charts_parsed_failed.png

The four chart panels were fragmented into labels, scattered values, and a broken HTML table, making the trend data unusable.

image

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image

The Target logo was dropped; only the report title text remained.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input1_hybridearnings_ceo_sign.png

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image

The handwritten signature image was omitted, leaving only the printed Brian Cornell signature line.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input1_hybridearnings_growth_section.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: The multi-column growth page was flattened into interleaved paragraphs and bullets, so the intended column reading order was broken., doc2mark_input1_hybridearnings_growth_section_parsed_failed.png

The multi-column growth page was flattened into interleaved paragraphs and bullets, so the intended column reading order was broken.

image

Input artifact for "PDF-to-Markdown Conversion" test: Input, doc2mark_input1_hybridearnings_footnotes.png

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image

Output artifact for "PDF-to-Markdown Conversion" test: The table footnotes were extracted as a separate block of condensed text rather than staying attached to the table., doc2mark_input1_hybridearnings_footnotes_parsed_failed.png

The table footnotes were extracted as a separate block of condensed text rather than staying attached to the table.

file

input3_scannedpaper.pdf

Scanned research paper used as the OCR test case.

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file

doc2mark_input3_scannedpaper_output.md

Loading file...

No markdown output was produced; the result file is 0 bytes, so the scanned document path is not usable in this open-source-only setup.

pdf

input1_hybridearnings.pdf

↓→

markdown

doc2mark_input1_hybridearnings_output.md

Loading file...

The 84-page hybrid earnings report completed in 29 seconds without truncation or a crash, although formatting errors persisted throughout the file.

pdf

input2_financialpdf.pdf

↓→

markdown

doc2mark_input2_financialpdf_output.md

Loading file...

The 18-page financial report completed in 15 seconds with complete text extraction, but table formatting stayed inconsistent.

Bottom Line

The footnotes survive as text, but they are no longer tightly linked to the table they explain.

From our researchPDF to markdown using open source libraries

Pricing

Free and open source

Open source

MIT-licensed

The report describes doc2mark as MIT-licensed and free.

✓ Use This If

●You need an open-source, self-hostable baseline for native-digital PDFs.

●Your documents are prose-heavy and section headings matter more than table fidelity.

●You can manually clean up tables, charts, and dropped images after conversion.

●You want long reports processed without truncation or crashes.

✕ Skip This If

●You need faithful complex table reconstruction.

●You need charts, logos, figures, or signatures to survive conversion.

●You need built-in OCR for scanned PDFs.

●You need stable markdown-only table output.

●You need reliable reading order in multi-column pages.

developer-toolsdocumentation-toolstext

Yes for native-digital text. The Target business section and the Japanese disclaimer were extracted, and major section breaks were often recognizable, but minor headers could still be formatted inconsistently.

Not reliable for dense tables. The annual-report tables and quarterly business results lost row and column structure; some simpler tables came out as markdown or HTML, but the syntax changed across pages.

No. The four-panel financial highlights chart was split into labels, numbers, and a broken table, so the trend data was not recoverable.

No. The cover logo and the CEO signature were dropped or reduced to text, with no image placeholders.

Not in this open-source-only benchmark. The scanned paper produced a 0-byte markdown file, and the report says OCR needs an external OpenAI API integration.

Only partially. Single-column text and the table of contents stayed readable, but the two-column 'A Growth Story Again' page was interleaved and jumbled.

The report describes it as open source (MIT) and lists it as free / $0.