Omega Free Backoffice Osclass Theme

Do not use this theme. Latest version is already present in latest version of Osclass. This version is kept here for older Osclass versions!

First and only one free oc-admin backoffice theme for osclass brings fresh new layout, redesigned navigation menu perfect login page and much more!

Free Oc-Admin Osclass Backoffice Theme

Easy and intuitive layout turns your osclass backoffice from archaic oc-admin and helps you to manage classifieds much more effective:

intuitive design
fine colors
new navigation menu (collapsed - only icons visible, 50px width; expanded - icons and text visible, 210px width)
redesigned top bar menu with notifications
osclass market links and feeds partially removed or replaced
beautiful login page
smart footer

Installation

As osclass does not support uploading and changing oc-admin backoffice themes by default, it still has functionality to switch themes.

In order to install theme please download Oc-Admin Themes Uploader for Osclass Plugin that allows you to upload, activate, change or remove backoffice theme.

Translations

Backoffice themes for osclass are not able to translate itself, but it does not mean they cannot be translated at all. In order to translate oc-admin theme:

go to file: oc-content/languages/{your_locale}/core.po
update file from core OR add missing strings manually
refresh .mo file after save

Emergency

Something crazy happened and your oc-admin is down? No worry it's easy to revert back to default theme.

Login to your database
Go to table _t_preference
Find row where s_section = 'osclass' and s_name = 'admin_theme' and change s_value into modern (from omega)
(optional) remove folder oc-admin/themes/omega

support and compatibility

Theme is designed for osclass 3.8, however there are no changes in backoffice in several last versions, therefore it should work properly for all 3.* versions.

Note: Do not upload into osclass as standard front-office theme, use backoffice theme uploader plugin or extract directly into oc-admin/themes folder!

Note: This theme will work with latest version of Osclass only, therefore it does not make too much sense to download it. Theme will not work on older versions of osclass or other osclass branches!

Last update of product description has been on 7. June 2026

Product features and functionality

Vertical navigation menu

Font Awesome (icons) integration

MB Themes

Premium developer

223 products

View seller profile

Product is without support. What to do in case of problems?

Check documentation for Osclass related questions

Use support forums

Consider using premium/paid product that includes support

Hire developer

Support quality, trust and engineering proof

Seller updated this product 10 times

Seller rating is 4.7 of 5 - Excellent (584 reviews)

Member since 2017

Support available in:

English

Czech

Slovak

This product is not compatible with WordPress. All our themes and plugins work exclusively with Osclass.

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For questions on free products please use support forums

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Frequently asked questions

Question: What is the main purpose of Omega Free Backoffice Osclass Theme?

Answer: Latest version is already present in latest version of Osclass.

Question: When is Omega Free Backoffice Osclass Theme the right choice?

Answer: It is suitable for marketplaces that depend on already, present, kept, here and need predictable behavior in production.

Question: How should Omega Free Backoffice Osclass Theme be set up before launch?

Answer: Install on staging, configure theme options, and test category navigation, search filters, publish flow, and account pages before production rollout The setup details for Omega Free Backoffice Osclass Theme are different in production.

Question: How should compatibility be checked for Omega Free Backoffice Osclass Theme?

Answer: Check template compatibility after Osclass core updates, plugin updates, and PHP version changes, especially on search and item pages The setup details for Omega Free Backoffice Osclass Theme are different in production.

Question: How can performance impact be tested for Omega Free Backoffice Osclass Theme?

Answer: Theme performance depends on image size, script count, and listing volume. Test mobile speed and category pages with realistic data volume The setup details for Omega Free Backoffice Osclass Theme are different in production.

Question: What are common issues with Omega Free Backoffice Osclass Theme?

Answer: Most issues come from template overrides, outdated custom edits, or conflicts with heavily modified plugins. Reproduce on staging with minimal overrides first The setup details for Omega Free Backoffice Osclass Theme are different in production.

Changelog - Product updates history

Version 3.1.3 released on 2021-04-27

Functionality update for Osclass 4.4, many bugs fixed, new sections added, admin color scheme added.

Version 3.1.2 released on 2021-01-26

PHP 8.0 compatibility update, osclass 4.3 feature updates, additional minor fixes

Version 3.1.1 released on 2020-12-21

Updates to align with osclass 4.2.2

Version 3.1.0 released on 2020-12-09

Different updates for new osclass version

Version 3.0.0 released on 2020-12-03

Includes all new functionalities of osclass 4.2 release

Version 2.0.1 released on 2020-10-12

Merge all updates made in osclass 4.1 in backoffice

Version 2.0.0 released on 2020-09-16

Major release, require osclass 4.0 or higher

Version 1.1.0 released on 2019-11-11

First bigger revision that fix numerous design issues and removing osclass market connections at all

Version 1.0.1 released on 2019-03-21

Several design issue fixed

Version 1.0.0 released on 2019-03-20

Initial release

View all products updates

Product rating: 5.0 - Excellent, based on 4 reviews

Review by Bob Stewart on 18. Apr 2021

5.0 - Excellent

Hi I am exploring OSClass for the first time and have a problem with the free admin theme. It shows an error message: Fatal error: Cannot redeclare omg_replace_gui() (previously declared in /homepages/23/d864631904/htdocs/Practitioners_Index/oc-admin/themes/omega/functions.php:6) in /homepages/23/d864631904/htdocs/Practitioners_Index/oc-content/themes/omega/functions.php on line 5 Is there a fix or do I have to buy an admin theme to complete my evaluation?

MB Themes response:

Remove omega theme folder from oc-content/themes folder, it is not front-office theme

superb hard working team by Harsha on 3. Jan 2020

5.0 - Excellent

best admin theme so we can say our customer to this is not a normal os class

thank you

not responsive by taktaz on 5. Oct 2019

3.0 - Good

The template is not responsive

MB Themes response:

Thank you, unfortunately for now we do not plan to make this theme responsive.

Excellent by Maks on 20. Mar 2019

5.0 - Excellent

Thank you! Everything works fine!

MB Themes response:

Happy to hear that

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Free download

5.0 - Excellent Based on 4 customer reviews

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MB Themes

Adrian Brezak is the founder of MB Themes, specializing in Osclass development, marketplace SEO, performance optimization, and payment integrations, with 12 years of experience in Osclass. He has delivered 2,200+ product updates and resolved over 9,200 support tickets throughout his career. See verified customer reviews on Trustpilot