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A collection of small Windows apps that solve everyday annoyances. All processing happens entirely on your PC — files are never sent externally.

xls・xlsx cleanerA cleanup tool for Excel files

Barely any data inside, yet Excel feels heavy.
We remove the cause — without even opening the file.

Repeatedly copying sheets leaves Excel files full of unused formatting, styles, and broken defined names. If your file feels too large for how little data it holds, or copying a sheet triggers a name-conflict popup, this "clutter" may be the cause.

Just drag and drop your file onto the window. No Excel installation required, and batch processing of multiple files is supported.

ExcelReduce file sizeFree version available

xls・xlsx cleaner screen: drop a file to see file size and reduction rate before and after processing — See the file size and reduction rate before and after processing

Fixes an oversized used rangeRestores the sheet's used range to its actual data, even when formatting alone had expanded it
Removes unused stylesCleans up duplicate styles such as "Normal_1" created by copying
Removes unused format definitionsStrips fonts, fills, and borders no longer referenced by any cell
Removes broken defined names (#REF!)Clears out defined names left dangling after sheets were deleted

Supported files	.xlsx / .xlsm (.xls / .xlsb can also be dropped for detection)
Safety	The original file is never modified; a new "xxx_cleaned.xlsx" is saved in the same folder. Your data and appearance are unaffected.
Typical results	Around 49%–85% reduction in our test files (results vary by file)
Price	Free version: up to 10 files total / Unlock the full version via in-app purchase for unlimited use
OS	Windows 10 (1809+) / Windows 11
Language	Japanese / English

Get it on Microsoft Store

Pic SlimmerAn image-slimming tool for Excel

Even after cropping, the hidden part is still there.
That might be why your file is dozens of MB.

When you crop an image in Excel, the pixel data outside the visible area stays in the file. Pic Slimmer removes that hidden data automatically — just drag and drop your file.

Optionally, it can also downscale images whose resolution is far higher than needed for their display size, shrinking the file further with no visible change.

ExcelImage compressionFree version available

Pic Slimmer screen: drop an Excel file to see file size and reduction rate before and after processing — See the file size and reduction rate before and after processing

Removes hidden data left after croppingRuns automatically every time. The visible appearance never changes
Resolution optimization (optional)Only when enabled, shrinks images with excessively high resolution
Drag & drop / batch processingProcess multiple files at once
Keeps the original file intactSaves the result as a separate "xxx_cleaned.xlsx" file

Supported files	.xlsx / .xlsm
Price	Free version: up to 10 files total / Unlimited add-on ¥200 (one-time)
OS	Windows 10 (1809+) / Windows 11
Language	Japanese / English

Get it on Microsoft Store

Image MergeA manual merge tool for split-scanned images

Scan A3 or A2 drawings on an A4 scanner.
Align the pieces down to the pixel and merge them into one.

A desktop tool for manually aligning, rotating, and cropping multiple images — scans, photos, and more — into a single merged image or PDF. Ideal for reconstructing a large drawing that was scanned in sections on an A4 scanner.

All features are free and unlimited.

Image / PDFDrawingsFree

Image Merge screen: manually aligning split-scanned images into a single merged image — Fine-tune image position down to the pixel while placing each piece

Layer-based placement & fine adjustmentDrag to move, or nudge 1px at a time with arrow keys (10px with Shift)
Rotate, flip, and adjust opacityRotate to any angle and overlay with transparency to check alignment
Automatic seam trimmingDetects and trims blank rows/columns, leaving only the margin you specify
Manual per-layer croppingTrim away fold marks or stray borders
Export as PNG or PDF (300dpi)Also supports saving and reopening projects
Can import PDF pages tooEXIF rotation from scanners and cameras is applied automatically

Price	Free (all features)
OS	Windows 10 / Windows 11 (64-bit)
Language	Japanese / English (auto-selected from your OS language)
Distribution	Microsoft Store / Vector (ZIP version, no installer required)

Apps

xls・xlsx cleanerA cleanup tool for Excel files

Pic SlimmerAn image-slimming tool for Excel

Image MergeA manual merge tool for split-scanned images

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