FIELD NOTE 01
A review-first workflow for merging, splitting, rotating, and cleaning PDFs
Prepare PDFs in the browser while preserving page order, accounting for every split page, and verifying metadata and output behavior.
Read guide →LocalUtils field notes
Practical guides for files you would rather inspect than upload
These articles document the workflows behind every LocalUtils tool. They focus on observable behavior, review steps, and limitations: what a format contains, what the browser changes, which mistakes are common, and how to check the downloaded result before it leaves your device.
FIELD NOTE 02
How to verify destructive PDF redaction instead of trusting a black box
Learn why PDF overlays can leave text recoverable, how LocalUtils rasterizes marked pages, and how to inspect the exported document.
Read guide →FIELD NOTE 03
Removing photo metadata is useful—then the pixel review begins
Inspect JPEG metadata, remove selected EXIF groups, and review the visible clues and unsupported data that can remain.
Read guide →FIELD NOTE 04
HEIC to JPEG or PNG: choose compatibility without pretending nothing changes
Understand browser HEIC conversion, output tradeoffs, metadata limits, memory use, and a practical comparison workflow.
Read guide →FIELD NOTE 05
Better OCR starts before recognition and finishes with human review
Prepare source images for English Tesseract OCR, understand common errors, and verify names, numbers, layout, and punctuation.
Read guide →FIELD NOTE 06
A QR code is only finished after the final artwork scans reliably
Create static QR codes with appropriate payload length, contrast, quiet space, output size, and destination verification.
Read guide →FIELD NOTE 07
Readable JSON is not automatically valid for the job—or safe to share
Validate JSON syntax, understand serialization, apply field-name scrubbing carefully, and search the result for remaining sensitive values.
Read guide →FIELD NOTE 08
Large CSV review is about parsing assumptions, not only row count
Inspect delimiters, quoting, encodings, bookmarks, row ranges, edits, and exports when a delimited file is too large for a spreadsheet.
Read guide →FIELD NOTE 09
A checksum comparison is strong only when the reference is trustworthy
Calculate file digests locally, choose the publisher's algorithm, compare complete values, and understand what a match cannot prove.
Read guide →FIELD NOTE 10
Base64 and hexadecimal describe bytes; they do not protect them
Convert UTF-8 text, Base64, and hexadecimal while accounting for byte encodings, padding, URL-safe variants, and unsafe decoded content.
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