J-F-Liu

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• `SaveOptions.linearize` is unused

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  Difficulty 2/5 1-3 hours Newbie friendliness 75/100

  J-F-Liu/lopdf#581 · Opened Oct 4, 2026

• Save corrupts existing `/Prev` pointer and fails to load the document afterwards. The file opens fine with other viewers.

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  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  J-F-Liu/lopdf#575 · Opened Sep 18, 2026

• `Document::decrypt` silently corrupts a document that `load_mem` has already decrypted

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  Difficulty 3/5 Half a day Newbie friendliness 55/100

  J-F-Liu/lopdf#574 · Opened Sep 14, 2026

• `LoadOptions.max_decompressed_size`: object-stream limit error is swallowed; PNG-predictor row buffers unbounded

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  Difficulty 3/5 1-2 days Newbie friendliness 45/100

  J-F-Liu/lopdf#569 · 1 comment · Opened Aug 22, 2026

• Add a document-wide xref entry budget for chained revisions

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  Difficulty 5/5 Over a week Newbie friendliness 15/100

  J-F-Liu/lopdf#563 · Opened Aug 20, 2026

• Lazy / random-access document reading

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  Difficulty 5/5 Over a week Newbie friendliness 15/100

  J-F-Liu/lopdf#554 · 1 reaction · Opened Aug 9, 2026

• Throws when a PDF has trailing padding after `%%EOF`

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  Difficulty 2/5 1-3 hours Newbie friendliness 72/100

  J-F-Liu/lopdf#548 · Opened Aug 5, 2026

• Make ttf-parser optional / migrate off it (unmaintained — RUSTSEC-2026-0192)

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  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  J-F-Liu/lopdf#514 · 1 comment · Opened Jun 30, 2026

• Tests broken on main: document_load_performance references missing assets/test.pdf

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  Difficulty 1/5 Under an hour Newbie friendliness 80/100

  J-F-Liu/lopdf#511 · Opened Jun 29, 2026

• Claude Code review findings

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  Difficulty 4/5 3-5 days Newbie friendliness 38/100

  J-F-Liu/lopdf#494 · 1 comment · Opened May 10, 2026

• Better support for the non strict mode

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  Difficulty 4/5 Over a week Newbie friendliness 12/100

  J-F-Liu/lopdf#484 · 1 reaction · Opened Mar 21, 2026

• [suggestion] Exclude assets from package?

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  Difficulty 2/5 1-3 hours Newbie friendliness 55/100

  J-F-Liu/lopdf#466 · Opened Feb 20, 2026

• Parse error when encoding is an indirect reference

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  Difficulty 3/5 1-2 days Newbie friendliness 42/100

  J-F-Liu/lopdf#463 · Opened Jan 6, 2026

• `replace_text` error

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  J-F-Liu/lopdf#452 · 4 comments · Opened Nov 24, 2025

• lopdf fails to parse pages tree when Object Stream is missing from xref (but PDFium and PDF.js succeed!)

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  bug parsing

  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  J-F-Liu/lopdf#449 · 2 reactions · Opened Nov 6, 2025

• Incorrect character spacing with external font

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  J-F-Liu/lopdf#448 · 3 comments · Opened Oct 21, 2025

• Bookmarks don't generate due to resulting_document.renumber_objects() called too early in Docs

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  Difficulty 1/5 Under an hour Newbie friendliness 55/100

  J-F-Liu/lopdf#447 · Opened Oct 17, 2025

• [Robust Improve Require] Incomplete pdf file crash the lib, but pdfium can parse it.

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  bug parsing

  Difficulty 3/5 1-2 days Newbie friendliness 22/100

  J-F-Liu/lopdf#446 · Opened Oct 4, 2025

• Assertion failed `self.table.is_full() || ...` in `weezl-0.1.10/src/decode.rs`

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  Difficulty 4/5 3-5 days Newbie friendliness 18/100

  J-F-Liu/lopdf#441 · Opened Aug 24, 2025

• Panic `called Result::unwrap() on an Err value: DictKey("ColorSpace")` in `src/parser/mod.rs`

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  Difficulty 3/5 1-2 days Newbie friendliness 55/100

  J-F-Liu/lopdf#440 · Opened Aug 24, 2025

• Example `examples/create_text_heavy_pdf.rs` not working

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  bug documentation

  Difficulty 3/5 1-2 days Newbie friendliness 38/100

  J-F-Liu/lopdf#437 · 1 comment · Opened Aug 13, 2025

• `Document::new()` creates a cross-reference stream while using PDF version 1.4

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  Difficulty 2/5 1-3 hours Newbie friendliness 52/100

  J-F-Liu/lopdf#434 · Opened Aug 5, 2025

• Exceeded allocation size when reading pdf

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  bug

  Difficulty 3/5 1-2 days Newbie friendliness 40/100

  J-F-Liu/lopdf#433 · 3 comments · Opened Jul 28, 2025

• pdfutil unable to load an object

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  bug parsing

  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  J-F-Liu/lopdf#432 · 1 comment · Opened Jul 21, 2025

• when replace text contains `jie` it will meet rendering issue

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  Difficulty 4/5 3-5 days Newbie friendliness 15/100

  J-F-Liu/lopdf#431 · Opened Jul 21, 2025

• Partial Text Replacement not work

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  Difficulty 3/5 1-2 days Newbie friendliness 40/100

  J-F-Liu/lopdf#428 · 1 comment · Opened Jul 20, 2025

• Uncaught error when loading a PDF document

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  J-F-Liu/lopdf#427 · 1 comment · Opened Jul 16, 2025

• failed parsing cross reference table: invalid start value

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  Difficulty 4/5 3-5 days Newbie friendliness 22/100

  J-F-Liu/lopdf#426 · 1 comment · 1 reaction · Opened Jul 16, 2025

• Text extraction produces "Identity-H Unimplemented" on file OCRed with OCRmyPDF

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  Difficulty 4/5 3-5 days Newbie friendliness 28/100

  J-F-Liu/lopdf#425 · 1 comment · Opened Jul 9, 2025

• Broken PDF Mergers in 0.35 Certain PDFs will break and display error in Adobe.

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  documentation

  Difficulty 4/5 3-5 days Newbie friendliness 22/100

  J-F-Liu/lopdf#424 · 11 comments · 1 reaction · Opened Jun 9, 2025

• Documentation (for example on Outline and Destination)

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  documentation

  Difficulty 3/5 1-2 days Newbie friendliness 30/100

  J-F-Liu/lopdf#420 · Opened May 30, 2025

• How do I edit existing pdf files?

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  documentation question

  Difficulty 3/5 1-2 days Newbie friendliness 25/100

  J-F-Liu/lopdf#419 · 2 comments · Opened May 19, 2025

• Does not compile on wasm32-unknown-unknown anymore since 0.36

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  Difficulty 3/5 1-2 days Newbie friendliness 42/100

  J-F-Liu/lopdf#408 · 5 comments · Opened Mar 19, 2025

• "corrupt deflate stream" reported for valid PDF

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  question

  Difficulty 4/5 3-5 days Newbie friendliness 33/100

  J-F-Liu/lopdf#387 · 6 comments · Opened Feb 16, 2025

• OneByteEncoding?

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  Difficulty 3/5 1-2 days Newbie friendliness 30/100

  J-F-Liu/lopdf#380 · 1 comment · Opened Feb 9, 2025

• How to filter page numbers, headers, and footers

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  Difficulty 4/5 3-5 days Newbie friendliness 22/100

  J-F-Liu/lopdf#377 · Opened Feb 8, 2025

• lopdf may miss-handle minus sign when lexing numbers

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  Difficulty 2/5 1-3 hours Newbie friendliness 50/100

  J-F-Liu/lopdf#375 · Opened Jan 28, 2025

• Only `Rgb8` Image Display Correctly After Embedded in PDF

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  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  J-F-Liu/lopdf#367 · Opened Dec 28, 2024

• Image Embed Issues with `Grayscale Image` and `RGBA PNG`

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  Difficulty 3/5 1-2 days Newbie friendliness 45/100

  J-F-Liu/lopdf#366 · Opened Dec 27, 2024

• Support metadata streams (XMP)

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 28/100

  J-F-Liu/lopdf#360 · Opened Dec 1, 2024

• 15_EventMaxiumSpeed_Qualifying.PDF can't be loaded because of overly strict startxref parsing

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  Difficulty 4/5 3-5 days Newbie friendliness 42/100

  J-F-Liu/lopdf#318 · 6 comments · Opened Sep 3, 2024

• Adding an HTML generation and processing module to lopdf would be perfect.

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  Difficulty 5/5 Over a week Newbie friendliness 8/100

  J-F-Liu/lopdf#313 · 1 reaction · Opened Aug 18, 2024

• Better support for signature verifications.

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  Difficulty 5/5 Over a week Newbie friendliness 5/100

  J-F-Liu/lopdf#305 · 2 comments · Opened Aug 13, 2024

• `extract_text` inserts newlines where it shouldn't

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  Difficulty 3/5 1-2 days Newbie friendliness 35/100

  J-F-Liu/lopdf#292 · 3 comments · Opened Aug 7, 2024

• (Suggestion) replace panics with errors

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  J-F-Liu/lopdf#285 · 1 comment · 1 reaction · Opened Jul 18, 2024

• How to crop a certain area out of a PDF page, rotate it, and save it into a new pdf

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  question

  Difficulty 5/5 Over a week Newbie friendliness 15/100

  J-F-Liu/lopdf#280 · 2 comments · 2 reactions · Opened Jun 1, 2024

• How to extract images from a PDF？

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  documentation question

  Difficulty 4/5 3-5 days Newbie friendliness 12/100

  J-F-Liu/lopdf#278 · 3 comments · 1 reaction · Opened May 9, 2024

• Support Korean Font

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  Difficulty 4/5 3-5 days Newbie friendliness 20/100

  J-F-Liu/lopdf#277 · 1 comment · 1 reaction · Opened Apr 26, 2024

• Insert image and flatten form

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  Difficulty 4/5 3-5 days Newbie friendliness 15/100

  J-F-Liu/lopdf#268 · 1 comment · Opened Mar 4, 2024

• The image generated using qrcode has become corrupted

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  Difficulty 3/5 1-2 days Newbie friendliness 30/100

  J-F-Liu/lopdf#264 · 1 comment · Opened Feb 19, 2024