UTILGO

My workspace

Favorites and recent tool names stay in this browser only. Your files and results are not saved in this workspace.

Favorites

Recently used

Install app

If supported, use Install. On Android and desktop, look for Install app in the browser menu. On iPhone/iPad, use Safari → Share → Add to Home Screen. Menu names can vary by browser.

SSL Checker

Ready

Verify a public domain certificate and see its expiry date.

All tools are free to use. File size and processing limits may vary by tool.

How to use

Verify a public domain certificate and see its expiry date. Choose your input, adjust the options and start processing.

How are files processed?

Browser tools keep files on your device. Advanced document tools upload files for temporary server processing; the tool shows this before upload. Web lookups send queries to the server and public lookup services.

Practical guide

SSL Checker: Validity and Expiry Date

Browser warnings on checkout drive customers away. This guide verifies whether the certificate is valid, which hostnames it covers, and days remaining. Queries run server-side; test only public sites over standard HTTPS, max six requests. Results give a first impression.

Read the guide →

Practical articles on this topic

PWA (Progressive Web Apps) Guide: Making Web Apps Work Like Mobile Apps

PWA (Progressive Web Apps) transforms websites into apps that work like mobile apps, can be used offline, and can be added to the…

Web Security Checklist: Comprehensive Security Guide

Web security checklist covers the necessary measures to protect your site from common security threats.

Related tools

QR Code Generator

Generate a QR code from a link or text. Add a logo, colours, dot patterns and a frame; download a static QR as PNG or SVG and test it with your phone.

How to use QR Code Generator Enter text, a website, email or phone number. Choose module and corner styles, colors and a frame; optionally add a PNG, JPEG or WebP logo.

QR Code Reader

Decode a QR code in an image to see its text or link. Read a photo or screenshot in your browser and inspect the address before opening it.

How to read? Pick a photo or screenshot of the QR code and run it. If the code is blurry, try a sharper shot; dim the brightness on glaring screens. Copy

Password Generator

Generate random passwords for new accounts. Adjust password options to your needs; generated passwords are not sent to the server for processing.

How to use Password Generator Passwords and hashes are generated only in your browser and are not sent to our server. For the default WordPress 6.8+ user_pass format, wit

Barcode Generator

Create EAN-13, CODE 39 or CODE 128 barcodes. Practical for product labels and shelf pricing. Everything runs in this browser, the value is never stored.

How to use Pick a barcode type, type the value and run; an SVG downloads. Useful for packaging and shelf labels. EAN-13 needs 12 or 13 digits and the t

DNS Lookup

Look up A, AAAA, MX, TXT and other public DNS records.

How to use Look up A, AAAA, MX, TXT and other public DNS records. Choose your input, adjust the options and start processing.

IP Lookup

Read public IP allocation and registration data through RDAP. This is not precise geolocation.

How to use Your connection’s public IP and estimated country appear automatically. Copy the address or request network name, registered organization an

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