Issues

• Memory leak: sixel_frame_new(…, NULL) leaks the internally created default allocator (refcount imbalance)

  saitoha/libsixel#235 · Filter by author pencil3mark-zoe opened on Oct 11, 2026
  2

  

• How few colours can you actually see? A 2AFC test, and a request for replication

  saitoha/libsixel#232 · Filter by author saitoha opened on Aug 31, 2026

• UBSan: signed integer overflow in load_sixel() at src/loader.c

  saitoha/libsixel#230 · Filter by author MMu-Aqua opened on Jul 25, 2026
  

• Memory allocation error when using sixel_encoder_encode_bytes()

  saitoha/libsixel#224 · Filter by author xyzzy42 opened on Apr 15, 2026
  3

• Out of bounds memory access with more than 1 pixel per byte pixel formats, e.g. SIXEL_PIXELFORMAT_G1

  saitoha/libsixel#222 · Filter by author xyzzy42 opened on Apr 13, 2026
  2

• Vulnerability in libsixel

  saitoha/libsixel#221 · Filter by author nicoppida opened on Mar 6, 2026
  1

• Consider setting background select to 1 by default

  saitoha/libsixel#215 · Filter by author j4james opened on Dec 7, 2025
  1

• [RFC] SIXEL dequantization

  saitoha/libsixel#213 · Filter by author saitoha opened on Oct 11, 2025
  1

• [RFC] Provide thumbnails and previews for *.six / *.sixel

  saitoha/libsixel#212 · Filter by author saitoha opened on Oct 4, 2025

• Color problem on DEC LJ-250 printer

  saitoha/libsixel#211 · Filter by author saitoha opened on Oct 4, 2025
  8

• Detected heap-buffer-overflow in src/quant.c:871:9

  saitoha/libsixel#209 · Filter by author Crispy-fried-chicken opened on Sep 9, 2025
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• Windows: MSYS/MinGW64 builds does not generate sixel image output in native MSYS/mintty terminal

  saitoha/libsixel#199 · Filter by author eabase opened on Aug 9, 2025
  65

• Which libsixel repository should be used? (Mixed info and no clarity in README.)

  saitoha/libsixel#198 · Filter by author eabase opened on Aug 9, 2025
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• [RFC] Enhancing SIXEL with a 1024-Color Palette

  saitoha/libsixel#196 · Filter by author saitoha opened on Aug 4, 2025
  6

• heap-buffer-overflow /src/tosixel.c:848 in sixel_encode_body_ormode

  saitoha/libsixel#187 · Filter by author j4james opened on Feb 15, 2025
  1

• Libsixel/libsixel fork

  saitoha/libsixel#185 · Filter by author Kreijstal opened on Feb 12, 2025
  15

• png2sixel does not work for small png files (~140x165)

  saitoha/libsixel#182 · Filter by author MiroPalmu opened on Oct 5, 2024
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• Feature request: Add palette mapping for VT240

  saitoha/libsixel#169 · Filter by author wohali opened on Aug 18, 2022
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• img2sixel - cursor appears above image when closing a looping GIF

  saitoha/libsixel#159 · Filter by author DePingus opened on Dec 4, 2021

• double free or corruption in encoder.c:831

  saitoha/libsixel#158 · Filter by author p870613 opened on Nov 7, 2021
  2

• Notification of fork at libsixel/libsixel (libsixel/libsixelのフォークのお知らせ). This project is unmaintained. (管理者 @saitoha が不在です。)

  saitoha/libsixel#154 · Filter by author ctrlcctrlv opened on Jun 9, 2021
  16

• It might be worthwhile to distribute sixel_decode as an example of C library decoding

  saitoha/libsixel#152 · Filter by author ctrlcctrlv opened on May 30, 2021

• transparent pixels aren't elided from output sixel

  saitoha/libsixel#149 · Filter by author dankamongmen opened on Mar 17, 2021
  19

• Problems building from source

  saitoha/libsixel#146 · Filter by author ahh opened on Feb 3, 2021
  1

• img2sixel produces empty output with no error for monochrome image

  saitoha/libsixel#141 · Filter by author asottile opened on Dec 20, 2020
  5