Prepare local files for printing and engine handoffs

One physical sheet needs two explicit views

Putting16/1 on one face is only half the imposition evidence: back2/15 and inner leaves must pair. Final-signature blanks are a layout decision,not missing pages. The source500-page book yields128 physical sheets and256 faces; sheet count and PDF page count should stay distinct.

Scanned spreads answer a separate reading task. Rotated visible direction determines regions; left/right-first determines delivered reading order. Retaining vector artwork does not preserve comments or forms: unsupported visible structures must fail before a full editor resolves them.

Print one signature to check actual duplex-driver behavior.
Download complete source/sheet/side mappings,not only the first200 rows.
Clipping is not erasure; separately review content privacy before sharing.

The same image can carry different meanings

A material task puts values such as roughness,metallic and AO into explicit channels. Spatial composition moves regions; automatic color conversion or premultiplication can change values read by the engine. Browser display helps inspect dimensions but cannot prove stored RGB beneath alpha0.

Check the actual handoff
Layer	Evidence
Space	Equal dimensions,coordinates not resampled
Channels	Complete file/source-channel/constant mapping
Bytes	Raw PNG decoding,independent full-pixel readback

Hidden is not deleted

The source user must retain regulated material worksheets while hiding them, and locate matching summary rows. Inventorying declarations is more reliable than guessing from appearance. sheet.state and row/col.hidden are checkable declarations; collapsed and dimensions have different semantics. A veryHidden inventory does not imply password bypass or unlocking.

Complete failure is more useful than a false zero

Default zeroHeight and overlapping column definitions require exact Excel precedence. This version explicitly rejects both rather than reporting no hidden content. Likewise,a texture with mismatched dimensions or unsupported color management cannot yield an apparently normal map whose data has changed.

Keep originals and complete reports; previews show bounded samples.
Retry after cancellation and check all mappings or ranges in the new output.
Visibility inventory is one sharing check; it certifies neither privacy nor forensic erasure.

References

User task: folding a500-page book into signatures
Body read2026-10-07; the task is not ordinary continuous2-up.
User task: splitting course double-page scans in one pass
Body read2026-10-07; explicit crop proportion and visible direction,no automatic OCR.
User task: packing material data into channels
Body read2026-10-07; the source task combines channels, not spatial image regions.
User task: listing hidden material worksheets and summary rows
Body read2026-10-07; inventory declared states before changing or removing them.

Tools in this category

Expand a tool to see its steps, options and supported formats, then open its workspace.

PDF signature booklet impositionImpose continuous reading pages into foldable signatures with complete physical-sheet,side and source-page mappings.

Choose signature size,left/right binding,A4/Letter landscape paper,margin and gutter. Each flat side is viewed upright from its printed side with top edges aligned. Pad the final signature to its full selected slot count with explicit blanks. Check duplex flip settings on your printer with a small sample; driver behavior is not inferred.

Steps

Choose the PDF and signature/binding settings.
Review paired sides and padding; print one signature as a sample.
Download complete booklet PDF and sheet JSON/CSV.

Available options

Pages per signature: multiple of4: 16
Binding: Left binding · Right binding
Landscape paper: A4 · Letter
Margin each edge mm: 10
Gutter mm: 4

Capabilities and limits

One30MiB PDF with at most500 pages; complete outputs80MiB. This500-page limit does not change other PDF tools.
Keep visible CropBox and quarterturn-rotated page vector/image artwork. Reject encryption/signatures,annotations/interactive forms,active actions/scripts,optional layers,page-level transparency Group,non1 UserUnit,bad page trees,edges>14,400pt or nonquarterturn rotations. Original metadata/bookmarks/forms are not preserved. This is not forensic removal; cropped-out source content may remain in the output.
4–64 pages per signature,in multiples of4; printable slot area must be positive. Uniformly scale and center each source page into its slot; no guessed spine thickness or creep.
Drawing instructions total80MiB including stream separators; plain/Flate/ASCII85/ASCIIHex/RunLength page-content streams only. Reject other instruction filters and predictor/unknown decode parameters. Encoded image resources are retained and shared without image transcoding.

Open PDF signature booklet imposition →

Split scanned spreads into reading pagesSplit each scanned spread into real reading pages at an explicit vertical proportion after visible crop and rotation.

The cut is a proportion of the visible,rotated page width. Choose left-first/right-first and optionally keep the first/last source whole. Mixed page sizes use the same proportion; no automatic gutter detection,perspective correction,OCR or deskew.

Steps

Select a scanned-spread PDF.
Set cut ratio,reading order and whole-cover policy.
Review complete source mapping and download PDF/JSON/CSV.

Available options

Left-region width ratio: greater than0,less than1: 0.5
Reading order: Left first · Right first
Keep whole pages: None · First source · Last source · First and last

Capabilities and limits

One30MiB PDF with at most500 pages; complete outputs80MiB. This500-page limit does not change other PDF tools.
Keep visible CropBox and quarterturn-rotated page vector/image artwork. Reject encryption/signatures,annotations/interactive forms,active actions/scripts,optional layers,page-level transparency Group,non1 UserUnit,bad page trees,edges>14,400pt or nonquarterturn rotations. Original metadata/bookmarks/forms are not preserved. This is not forensic removal; cropped-out source content may remain in the output.
At most500 source pages/1000 reading pages; finite cut0<cut<1. Keeping both with a one-page source yields one whole page.
Drawing instructions total80MiB including stream separators; plain/Flate/ASCII85/ASCIIHex/RunLength page-content streams only. Reject other instruction filters and predictor/unknown decode parameters. Encoded image resources are retained and shared without image transcoding.

Open Split scanned spreads into reading pages →

Material texture channel pack and unpackCombine explicitly selected raw PNG channels into material data textures, or unpack grayscale channels, retaining RGB beneath transparency.

Choose equal-size static RGB/RGBA PNGs. Enter a supplied file index and channel such as1:R, or an integer0–255, for each target R/G/B/A. Unpack takes exactly one PNG and writes grayscale RGB with alpha255. Browser preview color and transparency are visual only; stored bytes define the deliverable.

Steps

Select1–4 equal-size PNGs.
Set channel mappings or select single-image unpack.
Review preview and complete mapping; download real PNGs and JSON/CSV.

Available options

Operation: Pack · Unpack
Target R: file index:channel or constant0–255: 1:R
Target G: file index:channel or constant0–255: 1:G
Target B: file index:channel or constant0–255: 1:B
Target A: file index:channel or constant0–255: 255
Channels to unpack: All · R · G · B · A

Capabilities and limits

At most4 files,10MiB each/32MiB combined;4,194,304 pixels each,64MiB total decoded RGBA; complete outputs100MiB.
Only8-bit RGB/RGBA non-interlaced static PNG; validate IDAT, CRC and filters. Reject indexed,16-bit,animation,color profiles/gamma/EXIF. No resize,color conversion or premultiplication. Allowed text/physical/time metadata is dropped; no float or UDIM support.

Open Material texture channel pack and unpack →

Hidden worksheet and row/column inventoryInventory declared hidden/veryHidden worksheets and explicitly hidden row/column ranges in a local XLSX without modifying it.

Read actual workbook relationships and worksheet XML, then download complete names, IDs, part paths and1-based ranges. Missing state means visible; collapsed or zero size is not guessed to mean hidden. This version atomically rejects default zeroHeight=true rows and any overlapping column declarations.

Steps

Select a local XLSX.
Review hidden worksheets and compressed row/column ranges.
Download full JSON/CSV; the original stays unchanged.

Capabilities and limits

One30MiB XLSX; ZIP80MiB expanded/10,000 entries/ratio200; XML20MiB total/1m nodes,200k nodes each/depth128. At most1,000 worksheets,100k declared rows and100k column definitions; complete reports10MiB.
Ordinary unsigned/nonmacro/unencrypted XLSX with transitional OOXML. Reject external/escaping/missing/duplicate worksheet targets, duplicate names/IDs, bad booleans and bounds. No formula execution,decryption,password changes or claim to find all sensitive content.

Open Hidden worksheet and row/column inventory →

Tools used in this article

PDF signature booklet imposition →Impose continuous reading pages into foldable signatures with complete physical-sheet,side and source-page mappings.Split scanned spreads into reading pages →Split each scanned spread into real reading pages at an explicit vertical proportion after visible crop and rotation.Material texture channel pack and unpack →Combine explicitly selected raw PNG channels into material data textures, or unpack grayscale channels, retaining RGB beneath transparency.Hidden worksheet and row/column inventory →Inventory declared hidden/veryHidden worksheets and explicitly hidden row/column ranges in a local XLSX without modifying it.