Browser-first tools and practical notes

Browser tools for everyday work and learning.

Use tools for common tasks, and read related articles when you want background or practical examples.

Start with these staples

Start with commonly used tools.

PDF Merger

Merge multiple PDFs inside the browser, even if they use different page sizes. Reorder pages via thumbnails and work quickly offline.

PDF Splitter

Extract page ranges from a PDF, reorder them, and export each as its own document. Download splits individually or as a ZIP archive, with all processing kept inside the browser.

Regex Tester

Visualize regular-expression matches with highlighting and match lists. Supports g/i/m/s/u/y flags and ships with over 100 practical pattern examples. Everything runs client-side.

JSON Formatter / Validator

Format JSON with indentation, minify it by stripping whitespace, or validate the syntax in your browser.

Bulk Image Resizer

Resize multiple JPG/PNG images to specified dimensions in one go and download them as a ZIP file—no server involved.

QR Code Generator

Convert text or URLs into QR codes and export them as SVG or PNG. Choose size, error correction level, and colors—fully supports Japanese text, line breaks, and spaces.

Explore by use case

Choose the group that matches what you want to do.

Documents and file cleanup

Merge PDFs, split pages, and replace text in Word files from the browser.

PDF Merger PDF Splitter Bulk Find & Replace (.docx)

Developer and data workflows

Format payloads, compare text, and test patterns without switching tools.

JSON Formatter / Validator Text Diff Viewer Regex Tester

Images and code generation

Resize images, generate QR codes, and prepare barcodes for handoff.

Bulk Image Resizer QR Code Generator Barcode Generator

Latest posts

Can AI agents or RAGs replace service desks? ── Reasons for getting stuck and real solutions 2026-03-11
We will summarize the typical failure patterns when attempting to replace the service desk with an AI agent, and present a realistic implementation procedure for running the KCS loop with AI assistance.
Practical log investigation to restore failure time from UUIDv7/ULID 2026-03-07
We will summarize the practical steps to use the time information included in UUIDv7 and ULID to restore the time of failure and speed up primary isolation. It also deals with the pitfalls of time differences, clock discrepancies, and identical ms collisions.
How to Safely Rescue Mixed-Charset Files in Bulk: Why I Built This Tool 2026-03-07
This article explains an operational workflow built for real environments where CSV from internal systems, Excel exports, and Linux/Windows/DB outputs mix encodings, line endings, and BOM behavior.
Why IT Costs Keep Rising in Enterprises: New Initiatives Are Praised, but Retirement Decisions Are Not 2026-03-07
This article explains why IT costs in enterprises keep increasing, focusing on performance management, psychological safety, executive incentives, and the difficulty of system retirement and consolidation.
Building a PS1 GUI Utility That Makes ServiceNow Operations Easier 2026-02-15
This article explains why I built a PowerShell utility that supports routine ServiceNow data exports and Database View definitions through a GUI, how it was designed, and what impact it had.
Browser-only DICOM anonymization: Inside the DICOM (.dcm) viewer/anonymizer 2025-09-25
A detailed walkthrough of ixam.net's DICOM (.dcm) viewer/anonymizer, covering its capabilities and operational safeguards.

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