# Tools & Resources

URL: https://symelo.com/tools

Free browser tools for images, code, email and domains, plus free WordPress plugins and WordPress themes.

## Free tools

### JSON Viewer

Validate, format, search, and inspect JSON trees in the browser.

### Text & Code Diff Checker

Compare text or code with whitespace controls and diff export.

### HTML Cleaner

Clean HTML in the browser by removing unwanted tags, attributes, styles, and comments.

### QR Code Generator

Create branded QR codes with custom colors, center images, and PNG or SVG export.

### Placeholder Image Generator

Generate custom placeholder images with seeded backgrounds and SVG, PNG, or JPG output.

### Symelo Images

Edit images with layers, clipboard paste, and export. Files stay on your device.

### Password & Random Generator

Generate passwords, passphrases, names, and custom patterns with adjustable character rules and batch export.

### Domain Registration Checker

Check one domain or a list for registration records and metadata.

### SMTP Test Tool

Test an SMTP server's connection, TLS and login, and send a test email while reading the full SMTP conversation.

### UpHeron - Uptime Monitor

Monitor uptime, endpoints, SSL certificates, and heartbeats from several regions, check your sites for vulnerabilities, and get notified, with incident alerts and public status pages.

## Tool links

- [JSON Viewer](https://symelo.com/tools/json-viewer): Validate, format, search, and inspect JSON trees in the browser.
- [Text & Code Diff Checker](https://symelo.com/tools/diff-checker): Compare text or code with whitespace controls and diff export.
- [HTML Cleaner](https://symelo.com/tools/html-cleaner): Clean HTML in the browser by removing unwanted tags, attributes, styles, and comments.
- [QR Code Generator](https://symelo.com/tools/qr-code): Create branded QR codes with custom colors, center images, and PNG or SVG export.
- [Placeholder Image Generator](https://symelo.com/tools/placeholder-images): Generate custom placeholder images with seeded backgrounds and SVG, PNG, or JPG output.
- [Symelo Images](https://images.symelo.com/): Edit images with layers, clipboard paste, and export. Files stay on your device.
- [Password & Random Generator](https://symelo.com/tools/password-generator): Generate passwords, passphrases, names, and custom patterns with adjustable character rules and batch export.
- [Domain Registration Checker](https://symelo.com/tools/domain-checker): Check one domain or a list for registration records and metadata.
- [SMTP Test Tool](https://symelo.com/tools/smtp-test): Test an SMTP server's connection, TLS and login, and send a test email while reading the full SMTP conversation.
- [UpHeron - Uptime Monitor](https://upheron.com/): Monitor uptime, endpoints, SSL certificates, and heartbeats from several regions, check your sites for vulnerabilities, and get notified, with incident alerts and public status pages.

## WordPress plugins

- [Symelo SMTP](https://symelo.com/tools/wordpress-plugins/symelo-smtp): Reliable email delivery for WordPress: SMTP and provider APIs, email logs, failure alerts and a backup connection.
- [Symelo Image Optimizations](https://symelo.com/tools/wordpress-plugins/symelo-image-optimizations): Faster images: compression, WebP and AVIF, resizing, metadata removal, responsive and lazy-loaded images. Every change can be undone.
- [Symelo Backups and Migration](https://symelo.com/tools/wordpress-plugins/symelo-backups-and-migration): Back up files and database to the cloud, restore in one click even when the site is broken, and migrate to a new domain or server.
- [Symelo Image Optimizations Pro](https://symelo.com/tools/wordpress-plugins/symelo-image-optimizations-pro): Command-line encoders for Symelo Image Optimizations: cwebp, avifenc, jpegoptim, oxipng, pngquant and qpdf, installed or as pinned builds.
- [Symelo Bulgarian Shipping for WooCommerce](https://symelo.com/tools/wordpress-plugins/symelo-bulgarian-shipping-for-woocommerce): Speedy, Econt, Pigeon Express and BOX NOW for WooCommerce: office, locker and door delivery with live prices, waybills, tracking and the НАП file.

## WordPress themes

[All WordPress themes](https://symelo.com/tools/wordpress-themes): 107 free block themes.

## Related pages

- [All tools](https://symelo.com/tools)
- [Agent documentation](https://symelo.com/llms.txt)