Professional Online PDF & Image Tools, simplified.
Free browser-based utilities for PDF, PNG, JPG, and JSON. Fast, secure, and no signups required.
PDF Power Tools
Compress PDF
Reduce size while keeping quality.
Merge PDF
Combine multiple PDFs into one.
Split PDF
Extract pages from documents.
Image & Design
Compress Image
Reduce file size while keeping quality.
Convert Image
Convert between JPG, PNG, WebP and more.
Crop Image
Crop and trim images with per-image controls.
Resize Image
Change dimensions and aspect ratio — all in your browser.
Rotate Image
Rotate images 90° or flip horizontally or vertically.
How It Works
1. Choose & Upload
Pick a tool and drop in your PDF or image files. No account needed.
2. Adjust Settings
Tweak quality, dimensions, or page ranges. Everything is processed locally in your browser.
3. Download Instantly
Get your processed files in seconds. No waiting, no email — just download.
Why Zelo Tools?
Privacy First
Most tools run entirely in your browser — your files never leave your device. For tasks that need a server, files are processed and immediately discarded.
Instant & Unlimited
No file-size caps, no daily limits, no queues. Process as many PDFs and images as you need — results appear in seconds, powered entirely by your own hardware.
Works Everywhere
Desktop, tablet, or phone — Zelo Tools works in any modern browser. No installs, no plugins, and no signup. Just open the page and start.
Frequently Asked Questions
Is Zelo Tools really free?
Yes, all tools on Zelo Tools are completely free to use with no hidden charges. There are no premium tiers or paywalls — compress PDFs, resize images, merge documents, and more at no cost.
Are my files safe and private?
Yes. Most tools run entirely in your browser, so your files never leave your device. For features that require server-side processing (like PDF compression), files are processed and immediately discarded — nothing is stored.
Do I need to create an account?
No. Zelo Tools requires no signup, no email, and no account. Just open the tool you need and start working immediately.
What file formats are supported?
Zelo Tools supports PDF files for compression, merging, splitting, and rotation. For images, we support JPG, JPEG, PNG, WebP, GIF, BMP, and TIFF across our compress, convert, crop, resize, and rotate tools.
Is there a file size limit?
Since all processing happens in your browser, there are no server-imposed file size limits. Performance depends on your device — modern devices handle files up to several hundred MB with ease.
Can I use Zelo Tools on mobile?
Yes. Zelo Tools is fully responsive and works on phones, tablets, and desktops. All tools are optimized for touch and smaller screens.