About Jakojak Tools

Jakojak Tools is a free collection of browser-based utilities for developers, designers, and everyday users. Every tool on this site runs entirely in your browser — nothing is uploaded to a server, and no account is required.

What we offer

We currently offer over 42 free tools across several categories:

• Document tools — merge, compress, rotate, watermark, and reorder PDFs; convert between images and PDF.
• Image tools — compress, crop, resize, and convert images; generate favicons; view EXIF metadata; convert SVG to PNG.
• Developer tools — format and validate JSON, XML, SQL, and YAML; encode and decode Base64, URL, HTML entities, and JWT; generate hashes, cron expressions, CSS gradients, and .htaccess rules; convert cURL to code; and more.
• Text tools — preview Markdown, count words, diff text, convert case, and remove whitespace.
• Generators — generate passwords, QR codes, UUIDs, Lorem Ipsum, and fake test data.
• Finance & calculators — calculate loan payments, salary, margins, percentages, days between dates, and unit conversions.
• Network tools — check IP addresses, DNS records, SSL certificates, and HTTP response headers.

Our principles

• Free, always. Every tool is and will remain free to use without registration or payment.
• Privacy first. All processing happens in your browser. We do not receive, store, or transmit your files or input data.
• No bloat. No sign-up walls, no paywalls, no countdown timers, no forced email capture.
• Works offline. Most tools continue to work once the page is loaded, even without an internet connection.

Contact

Have a suggestion, found a bug, or want to request a new tool? Reach out at hello@jakojak.com.