Download Objo Studio

Latest version: 26.10.3

Main app

Objo Studio

Install the full Objo Studio IDE for desktop, web and command line projects. Design, run and debug for free; a license unlocks building and publishing. Explore web apps.

DMG · arm64

macOS

Apple Silicon Macs.

Version: 26.10.3
Size: 1.3 GB

Download for macOS

macOS SHA-256 checksum

bf1eda3f9c240a0cd703575909c7b827f17c1c29307dce54691c8d659785647c

TAR.GZ · x64

Linux

Most modern 64-bit desktop Linux distributions.

Version: 26.10.3
Size: 1.3 GB

Download for Linux

SHA-256 checksum

2f8c039686134f08569480fae0e720b1066943bb906a4c9ac05fa9aa2f314638

The .deb and .rpm packages are for x64 (Intel/AMD) only. On ARM64 devices, including Raspberry Pi, use the ARM64 tarball below.

Download ARM64 tarball

For 64-bit ARM Linux devices such as Raspberry Pi 5 and ARM workstations.

File size: 1.2 GB

Linux ARM64 SHA-256 checksum

aff23ab7b460ff6e70e8ddcdb159493d1cf7c560129f1d2e3b53a686905abb01

Download .deb package (x64 only)

For Debian 12+ and Ubuntu 24.04+.

File size: 951.8 MB

Debian/Ubuntu package (.deb) SHA-256 checksum

ca6a7987f29fbb557b6475746ee60c1b9fc60fec36ab4d26677be6e3e7b1d9c7

Download .rpm package (x64 only)

For Fedora, RHEL and other RPM-family distributions.

File size: 1.0 GB

Fedora/RHEL package (.rpm) SHA-256 checksum

2f57549509b5eff49be3d893d2f9d3e30b5b797efd38906859548f57062456ce

MSIX · x64

Windows

64-bit Windows PCs.

Version: 26.10.3
Size: 1.3 GB

Download for Windows

SHA-256 checksum

06ba79837d8ffe4f35a4c074d0fdec478309dd4ad60fcee4f3ffac762f120415

Download portable ZIP

For Windows Server and constrained VM environments. Unzip to a folder such as F:\Apps\Objo and run Objo.Studio.exe.

File size: 1.3 GB

Portable ZIP SHA-256 checksum

1aeb6babb32310e1eddc93d9e86579de21909c3a633df092968d40d55aa3fe85

Need an earlier version to reproduce an issue? Browse previous releases.

Optional tool

Objo Remote Debugger

The Remote Debugger is only needed when you want to run and debug apps on another machine. You do not need it to debug apps on the same machine as Objo Studio. Install it on the target Mac, Windows PC or Linux machine on your network, then connect from Objo Studio to run apps remotely with breakpoints, stepping and variable inspection.

macOS DMG · arm64 Download Windows MSIX · x64 Download Linux TAR.GZ · x64 Download

Extend Objo Studio

Plugin SDK

Write a C# wrapper around a .NET or native library and the SDK packages it as a single .objopackage, ready to install in Studio and share with other Objo developers.

Plugin SDK GitHub releases Download Build your first plugin Documentation Read

What’s New in 26.10.3

New features / improvements

1680: Show OS console messages in muted grey and add a setting to hide them (IDE)
1681: Test published web apps from other devices on the local network (IDE, Web)
1694: MessageBox returns the pressed button and supports multiple buttons (Desktop)
1711: Convert to Uppercase and Convert to Lowercase commands in the code editor (IDE)
1732: Add a responsive NavigationBar control for Web pages (Compiler, IDE, Web)
1737: Optional C# runtime backend for Command Line applications (Compiler, IDE)
1760: Publish Objo Studio for Linux ARM64 (IDE)
1805: Allow external input paths in the Plugin SDK (Compiler)
1815: Add Canvas.Invalidate for coalesced desktop repaints (Desktop)
1818: Allow custom control subclasses to be placed on web pages (Web)
1825: Publish a Linux ARM64 Studio download (IDE)

Fixes

1739: Pie chart slice labels overlap each other and the title (Desktop)
1740: Pie chart legends run off the chart and hide categories (Desktop)
1741: Existing coloured windows become see-through after upgrading (Desktop, IDE)
1742: macOS ignores window Opacity, alpha frost, and Mask transparency (Desktop)
1743: Destructors can repeat when caught exceptions retain the receiver (Compiler)
1744: Top-level overloads can execute the wrong function body (Compiler)
1745: Constructor overloads can execute the wrong body for enum arguments (Compiler)
1746: String array results can prevent object cleanup (Compiler)
1747: HashSet values snapshots can prevent object cleanup (Compiler)
1748: Finally loops can replace an unmatched exception with a collection error (Compiler)
1749: Fixed and ParamArray overloads can call the wrong declaration (Compiler)
1750: ByRef constructors and omitted defaults can fail at runtime (Compiler)
1751: Passing a property ByRef can fail during copy-back (Compiler)
1752: Awaited plugin operations can hang on a blocked host scheduler (Compiler)
1753: Matching array and generic interface parameters compile successfully (Compiler)
1754: Background operation results reliably wake waiting applications (Compiler)
1755: Fix Asc and CriticalSection errors, Task.FromResult typing and Shell timeouts (Compiler)
1756: Generic methods forward their type arguments correctly (Compiler)
1757: Generic methods accept matching constructed class parameters (Compiler)
1758: Generic methods check constructed member values against their type arguments (Compiler)
1759: Spinner tooltips and mouse cursors do not work reliably (Desktop)
1761: Sort the Inspector Toolbar and Menu Bar lists A-Z, ignoring case (IDE)
1762: Web Spinner remains visible when Active is False (Web)
1763: Custom ListBox text does not match the ListBox font (Desktop)
1764: Tab autocomplete jumps back to an earlier method call (IDE)
1765: Resizing or maximising Documentation can crash Studio after selecting text (IDE)
1766: TypeOf resolves namespaced and root Object types (Compiler)
1768: Web applications shut down cleanly with queued page activations (Compiler, Web)
1769: Native callbacks preserve outer exception handlers (Compiler)
1770: Field metadata keeps reference defaults alive (Compiler)
1771: Repeated calls select the correct Shared or instance method (Compiler)
1772: Repeated Object calls select the current argument overload (Compiler)
1773: Class indexers preserve ByRef arguments (Compiler)
1774: Compound assignments apply required user conversions (Compiler)
1775: Compound Assigns calls preserve ByRef arguments (Compiler)
1776: Inline functions preserve access to their owning instance (Compiler)
1777: Closures retain generic method type arguments (Compiler)
1778: Nested event failures preserve the outer handler context (Compiler)
1779: Bare compound assignments update inherited properties (Compiler)
1780: Async methods preserve their Task when completing immediately (Compiler)
1781: Captured variables survive nested async suspension (Compiler)
1782: Async event handlers retain their subscriber while suspended (Compiler)
1783: Async failures are observed through the returned Task (Compiler)
1784: Faulted Tasks preserve the original exception values (Compiler)
1785: Toggle Comment shortcut fails on German keyboards on Linux (IDE)
1786: Worker job results remain available after completion (Compiler)
1787: Application exception handlers receive the correct event context (Compiler)
1788: Array.SortWith preserves exceptions raised by comparison callbacks (Compiler)
1789: Streams preserve asynchronous buffers and release file handles (Compiler)
1790: Database results preserve ownership and release native resources (Compiler)
1791: Timer events preserve their source and lifetime across resets (Compiler)
1792: URLConnection events preserve their source and request lifetime (Compiler)
1793: LLM conversations release tools and cancel pending requests on shutdown (Compiler)
1794: Shell commands stop cleanly when a program exits (Compiler)
1795: TCP callbacks preserve their connection and event source (Compiler)
1796: UDP and WebSocket tasks preserve socket lifetime and message data (Compiler)
1797: Serial connections preserve binary reads and discard old device events (Compiler)
1798: PostgreSQL notification listeners stop cleanly when a program ends (Compiler)
1799: Character conversion functions reject invalid Unicode input (Compiler)
1800: System.Quit from plugin events exits with the requested code (Compiler)
1801: Worker failures preserve the process exit code (Compiler)
1802: Built applications retain DatabaseRow APIs (Compiler, IDE)
1803: Typing method parameters and descriptions stays responsive in large projects (IDE)
1804: Naming classes, windows and properties stays responsive in large projects (IDE)
1806: Improve HTMLViewer reliability on macOS and Linux (Desktop)
1807: Enumeration values are indented incorrectly after names ending in underscores (IDE)
1808: Insert menu shows duplicate Enumeration commands with different destinations (IDE)
1809: Enumerations cannot be dragged from a project into a module (IDE)
1812: Analyser does not report invalid enumeration members (Compiler)
1813: Whole-number literals in Double or Decimal array literals stay Integer at runtime (Compiler)
1814: 'As New' with DateTime is rejected in Var declarations (Compiler)
1819: Code editor rewrites typed member names to the casing of an unrelated same-named member (IDE)
1821: Keyboard module is not available in web projects (Compiler, Web)
1822: Drawing corruption in scaled Pictures after clip restore, shadows, and text (Desktop)
1823: Web app features fail silently when the page is served over plain HTTP (Web)
1826: AI Assistant fails with a generic error for Ollama models without thinking support (IDE)
1827: Plugin SDK releases link to the correct documentation (Other)
1833: Web page navigation opens the destination at the top (Web)

Read full release notes