Best Free Extensions & Plugins in 2026 | DevMixa

The best free and freemium Extensions & Plugins, tested by our team — with free plan limits and ratings.

42 tools listed · Updated October 2026

Bitwarden
SaaS / Web App · Mobile App · Desktop Software · Extension / Plugin

Open source password manager with a free plan on unlimited devices and $19.80/yr Premium

4.5 Freemium · from $1.65
GitHub Copilot
SaaS / Web App · AI Tool · Extension / Plugin

GitHub's AI coding assistant for completions, chat, agents and code review

4.4 Freemium · from $10
Grammarly
AI Tool · SaaS / Web App · Extension / Plugin

AI writing assistant that checks grammar, clarity and tone everywhere you type

4.3 Freemium · from $12
Proton VPN
SaaS / Web App · Mobile App · Desktop Software · Extension / Plugin

Swiss VPN with a no-data-cap free plan, Secure Core and audited no-logs claims

4.3 Freemium · from $9.99
$Rank Math logo$

Rank Math
Extension / Plugin · SaaS / Web App

WordPress SEO plugin with a generous free tier, schema builder and built-in rank tracker

4.3 Freemium · from €8.99
uBlock Origin
Extension / Plugin

Free, open-source ad and tracker blocker; full power on Firefox, Lite on Chrome

4.3 Free
Buffer
SaaS / Web App · AI Tool · Mobile App · Extension / Plugin

Queue-based social scheduler with a small free tier and per-channel pricing

4.2 Freemium · from $5
Dark Reader
Extension / Plugin

Open-source dark theme for every website, with per-site control and four engines

4.2 Freemium
Fireflies.ai
SaaS / Web App · AI Tool · Mobile App · Extension / Plugin · Desktop Software

AI meeting notes for Zoom, Meet and Teams, with Hindi and 100+ languages

4.2 Freemium · from $18
GeneratePress
Extension / Plugin

Lightweight WordPress theme with a $59 Premium plugin and a $149 GP One bundle

4.2 Freemium · from $4.92
Tampermonkey
Extension / Plugin

Userscript manager for Chrome, Edge, Firefox and Safari, free except the Safari app

4.2 Free
tl;dv
SaaS / Web App · AI Tool · Extension / Plugin · Desktop Software · Mobile App

Free unlimited meeting recordings for Meet, Zoom and Teams, with paid AI notes

4.2 Freemium · from $18
Astra Theme
Extension / Plugin

Free lightweight WordPress theme with a paid Pro addon for menus, layouts and stores

4.1 Freemium · from $5.75
Calendly
SaaS / Web App · Mobile App · Extension / Plugin · API

Booking links, team routing and reminders that end scheduling back-and-forth

4.1 Freemium · from $10
Elementor
Extension / Plugin · SaaS / Web App

Drag-and-drop WordPress site builder with a free core plugin and paid Pro and One plans

4.1 Freemium · from $5
LiteSpeed Cache
Extension / Plugin

Free WordPress cache and optimisation plugin, built for LiteSpeed servers and QUIC.cloud

4.1 Freemium · from $5
QuillBot
SaaS / Web App · AI Tool · Mobile App · Desktop Software · Extension / Plugin

AI paraphraser, grammar checker and humanizer built for students and everyday writers

4.1 Freemium · from $8.33
UpdraftPlus
Extension / Plugin · SaaS / Web App

Free WordPress backups to Google Drive or Dropbox, with paid plans for many sites

4.1 Freemium · from $5.83
WPForms
Extension / Plugin · SaaS / Web App

Drag-and-drop WordPress forms with entries, payments and 2,100+ templates

4.1 Freemium · from $99
Yoast SEO
Extension / Plugin · SaaS / Web App

WordPress SEO plugin with sitemaps, schema and live content checks, free or $118.80/yr

4.1 Freemium · from $9.9
All in One SEO
Extension / Plugin · SaaS / Web App

Veteran WordPress SEO plugin with a free core and four yearly paid tiers

4.0 Freemium · from $8.25
Otter.ai
SaaS / Web App · AI Tool · Mobile App · Extension / Plugin

AI meeting notes, live transcripts and summaries for Zoom, Meet and Teams

4.0 Freemium · from $16.99
WooCommerce
Extension / Plugin · API

Free, open-source WordPress plugin for running a fully owned online store

4.0 Free
Wordfence
Extension / Plugin · SaaS / Web App

WordPress firewall, malware scanner and 2FA plugin, free or $149/yr for Premium

4.0 Freemium · from $12.42

How we rank extensions & plugins

Tools we have tested hands-on are ranked first, by our overall score (ease of use, features, value and support). Listed tools that we have not tested yet show no score. Pricing on every review is checked against the official pricing page, with the date shown. Sponsored placements are labelled and never change a score.

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