Colección de herramientas en línea gratuitas para flujos de trabajo diarios.

Códigos QR, PDF, conversores, temporizadores y más. Sin registro ni instalación.

JW Tool Box ofrece más de 50 herramientas en línea gratuitas: PDF, códigos QR, conversores y calculadoras. Todo se ejecuta de manera segura en su navegador sin cargas al servidor.

Herramientas destacadas

Una muestra de las utilidades de navegador más útiles publicadas actualmente en JW Tool Box.

Guías recientes

El blog se mantiene solo en inglés y se centra en tutoriales prácticos que acompañan a las herramientas.

  • How to Merge PDF Files Free Online — No Uploads, No Limits (2026)

    Combining PDF files should be simple, free, and private. Whether you're merging a contract, assembling a thesis, or organizing receipts for an expense report, you shouldn't have to upload your documents to a stranger's server to do it. TL;DR — Use the PDF Merge Tool to merge any number of PDFs in your browser. No upload, no signup, no daily limits, no file size cap imposed by a server. Drag, d…

  • Instagram Reel Cover Size 2026: 1080×1920 Dimensions, Safe Zone & Grid Crop

    If your Instagram Reel cover looks great in preview but gets awkwardly cropped in your profile grid—or if text keeps disappearing at the edges—you're using the wrong safe zones. This guide gives you every dimension you need for 2026, with a simple workflow to get it right every time. ⚡ Quick Reference: Instagram Reel Cover Dimensions 2026 Element Dimensions Notes Reel video 1080 × 1920 px (…

  • Favicon Size Guide 2026: ICO, PNG, SVG, and Apple Touch Icon Sizes

    In the early web, a single favicon.ico file was enough. Today that is only the fallback layer. Modern sites usually need a small browsertab icon, a few PNG assets for higherdensity displays, and at least one icon large enough for PWA or launcher use. If you are still shipping only a blurry 16 px file, the brand signal is weak everywhere it matters: browser tabs, shortcuts, manifests, iPhone ho…

  • How to Keep Screen On During Google Meet, Zoom & Teams (2026)

    Working from home? Nothing kills your flow faster than your screen going dark in the middle of a Zoom call, a client demo, or while monitoring your work dashboard. Stop fighting with power settings. Use our Keep Screen On tool to prevent sleep mode with one click—no software installation, no admin privileges required. If your main problem is a lockeddown corporate laptop where IT prevents you…