Mirebit

Small images.
Exact bitmap files.

Prepare monochrome display graphics from your own images on iPhone and iPad. Inspect pixels, save named settings, and share actual bitmap data.

Conversion and output

Threshold, Bayer 4×4 and Floyd–Steinberg; brightness, contrast, inversion; 8–512 pixels per side; white contain or center crop. Export a ZIP with exact black-white PNG, packed P4 PBM, BIN, portable uint8_t C header, manifest and Readme. Row MSB, row LSB and vertical 8-pixel pages are available for BIN/C. All use 1=black and zero padding. PBM keeps its standard MSB row layout. Check your hardware library's conventions; no display connection, firmware flashing, controller initialization, PROGMEM or compatibility certification.

Limits and storage

PNG, JPEG and HEIC inputs up to 25 MB. Selected images become PNG working copies with a 2048-pixel longest side. Keep originals separately. Up to 40 local assets, 20 named presets per asset and 200 MB storage. Settings save automatically. Undo remembers 30 changes in the current session. Finished packages are not editable library backups.

Support

Email maga40@naver.com with app version, device, input format, target size, packing and what failed. Include an image only if you choose to and have permission to share it.

Privacy policy

Effective October 1, 2026. Gobling Company provides Mirebit. The app has no account, ads, analytics, tracking, third-party data SDK or developer server upload. Source images, names, presets, settings and generated files are processed and stored locally. The app does not collect this data.

Files and Photos system pickers give the app only the item you select. The app retains its PNG working copy and saved conversion settings. It does not request camera access or broad photo-library access.

Native sharing sends the package you choose to your selected destination. It contains the processed image, byte data, asset name and conversion settings. Review these before sharing; destinations have their own privacy policies.

Swipe Delete in Saved assets to remove the asset and its local files. Delete presets in Presets. Uninstall removes app-local data. Already exported copies remain at their destinations. Apple or computer backups may contain app-local data according to your settings.

Support receives only what you choose to email. Website visits create ordinary requests to the hosting provider. Neither is required for local processing.

Terms of use