JW Tool Box

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Practical guides for browser-based tools and workflows

Step-by-step articles, tested workflows, and reference guides that support the tools published on JW Tool Box.

  • Merge, Split & Reorder PDF Pages in the Browser — No Software, No Uploads (2026)

    TL;DR — Drop your PDFs into the browser, drag pages around, and export. The PDF tools process documents in your browser with JavaScript libraries and do not upload the PDF contents to JW Tool Box. The site still collects usage information as described in the Privacy Policy. Adobe Acrobat costs $240/year. Smallpdf and iLovePDF upload your files to their servers, which is a non-starter for NDAs,…

  • Convert CSV to JSON (and Back) Free Online — No Excel Needed (2026)

    Switching between CSV spreadsheets and JSON API payloads is one of those daily developer tasks that sounds simple but constantly bites you: mismatched delimiters, quoted fields with commas, encoding issues. This guide covers how to convert CSV to JSON (and back) instantly in your browser—no Excel, no Python script, no uploads. ⚡ Quick Start → CSV to JSON Converter — paste your data, convert, c…

  • Best Image Compression Settings for Social Media, E-commerce & Resumes (Free Guide)

    One compression preset does not fit every channel. The settings that work for a Shopify hero image are different from what works for an Instagram story cover or a resume headshot. This guide gives you practical starting points you can use with the Image Compressor without guessing from scratch. The Fast Rule: Width Matters More Than Most People Think If a platform displays an image at roughly…

  • Batch Watermark Photos Free (No Upload) | 2026 Guide

    Adding watermarks to photos protects your work and establishes ownership before sharing online. But doing it image-by-image is tedious—and uploading your photos to a cloud watermark service creates a privacy risk you probably haven't considered. This guide covers how to batch watermark photos free, directly in your browser, in under a minute. ⚡ Quick Start → Image Watermark Tool — drop your fi…

  • How to Compress PDFs Locally: Presets, Readability and Tradeoffs

    The PDF Compressor renders your PDF pages in the browser and rebuilds them using JPEG images. This can reduce image-heavy documents, but it is a lossy process. Keep your original and compare the exported file before sharing it. For a specific upload limit, use the tested PDF-under-2-MB workflow. This guide explains when compression is appropriate and which tradeoffs to check. What the compress…