v2.0.9 (21-Jul-2025)

Added

• YAML lexer / parser (currently only used for Docker compose sample syntax highlighting)

Changed

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Additional edge-case layout glitches on Windows systems
• Schema examples links change schema type combobox value to relevant type
• Protobuf constants have better contrast (in dark theme)

Security

• Nothing

v2.0.8 (20-Jul-2025)

Added

• Nothing

Changed

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Layout glitches on Windows systems using display scaling greater than 100%

Security

• Nothing

v2.0.7 (19-Jul-2025)

Added

• Docker notes and sample configuration

Changed

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Incorrect consumer group assigned partition count

Security

• Nothing

v2.0.6 (12-Jul-2025)

Added

• Color-coding consumer status on topic's consumers tab
• Topic message count tooltip popup

Changed

• Allowing cancellation of a bunch more blocking background tasks

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Various issues caused by lacking consumer groups describe access; now KafkIO recovers and uses what data it can

Security

• Nothing

v2.0.5 (11-Jul-2025)

Added

• Nothing

Changed

• Some internal improvements

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Failed connect task restart pop-up message
• Error when auto-refreshing enabled but no connector selected

Security

• Nothing

v2.0.4 (09-Jul-2025)

Added

• Configurable auto-refresh for connector states
• Automatically refresh task list if operation performed on connector (resume/stop/pause, etc.)
• New color-coded connector columns covering running, failed, paused & total task counts

Changed

• Minor updates to about dialog, including link to http://certak.com

Deprecated

• Nothing

Removed

• Non-official TASK_FAILED connector status (when connector running but with failed tasks)

Fixed

• Potential NPE if inter.broker.protocol.version broker settings, exists but has null value
• Potential NPEs if connector states or tasks states are irretrievable (i.e., deleted elsewhere)
• Inability to pause/start a connector that had certain combination of task statuses
• Version check was not always correctly ignoring versions, if chosen
• Version dialogs could stack if not closed, now preventing multiple new version dialogs
• Unexpected connector or task statuses could cause errors

Security

• Nothing

v2.0.3 (02-Jul-2025)

Added

• Color-coding Connector, Connect tasks, Consumer states
• Key/message text highlighting field automatically set to search text filter's text

Changed

• Reducing unnecessary logging

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Improved text filter searching performance/polling
• Correct number of "checked" messages when using a small page size with a text filter
• Optimised other searching
• Preferences pane padding
• MessageBox obfuscation error, when trying to load second instance

Security

• Nothing

v2.0.2 (01-Jul-2025)

Added

• Nothing

Changed

• Making masker pane "Cancel" link bold

Deprecated

• Nothing

Removed

• Nothing

Fixed

• "Not on FX application thread" error fix
• Other critical topic message search fixes / improvements

Security

• Nothing

v2.0.1 (01-Jul-2025)

Added

• Nothing

Changed

• Text filter paging warning now only occurs once (or when a particularly low paging size is chosen)
• Some language improvements

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Resource hog: duplicated background traversal of a topic when searching
• Edge case race conditions where some notifications during topic search would erroneously say zero messages were received

Security

• Nothing

v2.0.0 (30-Jun-2025)

Added

• Ability to refresh single Connector tasks
• Ability to test individual Connector/ksqlDB configurations (instead of all configured)
• Added scrollbar to Message search screen/form, to accommodate smaller resolutions
• Some prompt texts re: truststore, to Kafka Security tab
• Message text search filter by key, value, headers, or any combination
• Select a cluster color, and see it presented on various screens
• Warning if performing text search filter with small page size

Changed

• Multiple instance detection now relies on a file mutex rather than port, allowing concurrent usage by multiple users on some terminal
• First instance window will restore and shake (if hidden), on a second load attempt
• Allow removal of any Kafka Connect / ksqlDB multi-configuration, not just 2nd+ (remove link now present and all configurations)
• Messages search button re-located
• Incorporated the main menu into header bar, saving space
• Header bar styled according to theme
• Halving Kafka message/event memory consumption
• Masker popup "Cancel" button more visible with background
• Masker popup for message search with text filter contains number of matched records
• Messages displayed in streaming fashion (as they arrive) even for non-live streaming searches, mostly useful for long-lived searches (i.e., when using text filter on a large topic)
• Improved Kafka message search stats

Deprecated

• Nothing

Removed

• Removed default random color assignment to duplicated tabs; now only configured colors will apply, or none

Fixed

• Ignore offline nodes from target calculation when altering a replication factor
• Various topic dump delimiter bugs (particularly when encountering empty values), now parser-friendly
• Topic dump header for value schema ID now VALUE_SCHEMA_ID instead of VALUE_SCHEMA_VALUE
• Topic dump now including key/value schema IDs when requested (may have been empty before)
• Google search (for a setting) no longer disabled if the setting is non-editable (topic / broker settings)
• __consumer_offsets deserializer now selected by default when viewing __consumer_offsets topic
• NPE when adding a second Kafka Connect or ksqlDB configuration, if no name exists in first

Security

• Nothing

v1.2.2 (14-Jun-2025)

Added

• Edit broker settings from Settings tab
• Edit topic settings from Settings tab
• Search button placeholder on Topic messages table
• Pressing enter key on Messages tab performs search
• Quickly search (Google) for more info topic or broker setting keys
• Detect and format non-string headers automatically, display most suitable type
• Kafka 4.0 support

Changed

• Library updates
• Main menu padding & font size

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Minor language bugs
• Display / styling
• NullPointerException on Topic overview screen when leader info missing from broker

Security

• Nothing

v1.2.1 (05-May-2025)

Added

• Hex serde, to allow deserialization to hex as well as produce binary messages (via hex)

Changed

• More useful stacktraces in error cases, also for inclusion in bug submissions
• Some styling/language improvements
• Better IPV6 support for edge-case scenarios
• Hex views general improvements, including showing memory offsets
• Raw view now provides pre-deserialization key and value, as Hex table

Deprecated

• Nothing

Removed

• java.net.preferIPv4Stack is now unset/false

Fixed

• Allow entering of SASL (sasl.*) security properties, such as sasl.oauthbearer.token.endpoint.url
• Display as: HEX displays pre-deserialization hexadecimal
• No longer see 'REPLACEMENT CHARACTER' (U+FFFD) in Hex views
• Duplicating tab via context menu colour-coding parent tab logo correctly

Security

• Nothing

v1.2.0 (14-April-2025)

Added

• Ability to create duplicate cluster tabs, for concurrent exploring and easier correlation
• Ability to clone cluster configuration
• Ability to refresh topic information on messages panel (i.e., to refresh selectable SerDes and partitions, etc.)
• Auto-select Schema Registry as key/value deserializer/serializer, if suitable schema found in Schema Registry
• Ability to auto-detect proxies
• HTTP and SOCK proxy configuration support
• Filterable topic lists in ACL create views
• Topic favourites, easier access to commonly-used topics

Changed

• Notification popup (bottom right) text now bold
• Various language improvements
• Re-worked cluster tab context menus
• Default ACL host to "*"
• Default ACL user to "User:my_user"

Deprecated

• Nothing

Removed

• Nothing

Fixed

• ksqlDB hostname DNS issue (Vert.x) for private internal hostnames, whereby internal DNS servers (such as a router) were not being looked-up via JNDI
• Topic "other" setting description was replaced with default value rather than description
• NPE when non-primary mouse clicked on area of a deleted cluster config (rare)
• Main window split-pane divider always resetted to 50% on Linux
• Topics list became non-responsive if re-arranged a cluster position in the cluster tree

Security

• Nothing

v1.1.7 (30-March-2025)

Added

• New substitution variables: epoch.seconds, epoch.millis
• Cell-level tooltips for most tables, useful for smaller displays with truncated columns
• Progress feedback stats on message or dump search: messages and data size
• Stats on most result pages re: tables
• Warning popup when loading second instance of app (as opposed to silently shutting down)

Changed

• Pre-select topic on consumer offsets tweak dialog, if instantiated from topic view
• Notification popups take up less space
• Tooltips have smaller font
• Produce message substitution example button reads "Test" instead of "Substitute", less confusing on impact

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Schema Registry timeouts always set correctly
• Schema Registry timeout parsing correctly (when also using proxy configuration)
• Schema Registry "trust all certs" works in all scenarios, if configured on

Security

• Nothing

v1.1.6 (02-March-2025)

Added

• Copy summary of all rows in all tables via context menu
• Reproduce event to message dialog, pre-configuring key, value, headers, and serdes
• Message/key/header/token variable substitution, supporting various functions

Changed

• Improved topic streaming performance & high-volume backpressure tweaks
• Using JFX jmods instead of JARs (irrelevant to user)

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Streaming topics ordering improvements
• JSON formatter treats floating points as BigDecimals, which avoids scientific-notation for display
• Windows start menu group now "KafkIO" instead of "Unknown"
• Confusing/inaccurate tooltips
• AzureEntraClientCallbackHandler showing correctly on security callback dropdowns
• Rare Azure connectivity bugs
• Other minor bugs

Security

• Nothing

v1.1.5 (16-February-2025)

Added

• Nothing

Changed

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Dialog pane loading issues, particularly with produce message dialog
• Topic dump suggested paths fix

Security

• Nothing

v1.1.4 (16-February-2025)

Added

• Re-arrange clusters either via context-menu or drag & drop
• Dockable/un-dockable & pinnable windows for better management with large datasets
• Set message.timestamp.type from topic config dialog
• Topic dump creates parent directories if non-existent
• Network reachability testing tool

Changed

• Look and feel of buttons/controls, and theme colours
• Performance: all ksqlDB tabs now optionally loaded by the user
• Performance: data for topic view tabs are loaded upon tab selection only, not preloaded
• Several more tasks now cancellable
• Ability to maintain separate persisted views when switching between ksqlDB clusters

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Serialization issues with KafkIO instances communicating with each other (prevent multiple loads)
• Edge-case with JFX cache of another JFX-based app preventing KafkIO load
• Topic dump correctly remembers last specified directory
• ksqlDB statement results table now takes up full available height
• ksqlDB inefficient or non-necessary/duplicate communication to REST API in some cases

Security

• Nothing

v1.1.3 (03-February-2025)

Added

• Kafka Connect: ability to stop, pause, & start connectors, and reset connector offsets
• Ability to dump a topic to a file, using various criteria and data points

Changed

• Background jobs disappear from list when finished, rather than stay in list
• Add larger polling/page size options
• Default search page/poll size now 2000

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Various Kafka Connect connector management issues
• Rare display bug which could crash the application, particularly when scrolling
• Schema Registry REST issue
• JKS converter utility error if no password supplied
• Multiple minor bugs and display or language improvements

Security

• Nothing

v1.1.2 (26-January-2025)

Added

• Nothing

Changed

• "Add Cluster" instead of "New Connection"
• Other minor language improvements
• Logs no longer stored under a versioned directory, therefore old logs will be cleaned up as per standard rollovers, even after upgrading

Deprecated

• Nothing

Removed

• Unused preferences configuration

Fixed

• IPV6 DNS servers used incorrectly at times for ksqlDB connections, leading to obscure connection errors
• ksqlDB connection "default" port (if not specified) was 8088; now defaulting to 80 or 443
• NullPointerException(s) when switching from cluster to cluster in particular sequences

Security

• Nothing

v1.1.1 (19-January-2025)

Added

• Ability to copy text from any column or row, from any table
• Progress masker for KSQL selects (visual feedback that something is happening)

Changed

• Huge start-up performance boost on Windows, fixing slowness introduced in a previous release (Windows Defender the cause)
• Reduced package and installation file size by ~25%, and decreased application file count by 244 files (increasing installation speed)
• Moved "collapse after search" checkbox to minimise wrapping upon horizontally shrinking window
• Several language improvements changes

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Event key was not being trimmed (i.e., if large), even if size breached user-chosen maximum size
• NullPointerException if viewing a message with a null (not empty) message
• Consumer view NullPointerException if offset info from Kafka was null
• Repeated Kafka background re-connects (noisy logs) if user manually cancelled a connection before it succeeded

Security

• Nothing

v1.1.0 (14-January-2025)

Added

• Include message headers in message text filtering
• ksqlDB management support, with KSQL editor and streaming
• Kafka Connect connectors management support
• Live stream topic messages
• Ability to specify topic messages page or poll size
• Ability to specify topic key/message size before clipping (save memory)
• Ability to specify custom headers for any REST API client (i.e., if some cloud or other providers require)
• Ability to produce up to 100k messages at a time
• Status bar with memory stats
• Ability to configure all timeouts for all HTTP and Kafka clients
• Protobuf3 syntax highlighting
• Context menu icons
• Various tips and hints
• Ability to cancel certain background/loading tasks

Changed

• Many display improvements
• Many language improvements
• Immediately re-create HTTP clients after config changes
• Improved Overview screen
• Semantics of many timeouts
• JSON and XML syntax-highlighting improvements

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Topic config update wasn't updating if value selected from example/suggested hyperlink
• Many UI edge-case issues
• Various validations
• Many memory-consumption improvements

Security

• Nothing

v1.0.1 (19-December-2024)

Added

• Some timeouts to prevent infinite waiting screen in rare circumstances

Changed

• Slight increase in some default Kafka/Schema Registry timeouts

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Health view was blank in some situations

Security

• Nothing

v1.0.0 (17-December-2024)

Added

• Oauth support for Strimzi, Azure Event Hub (Microsoft Entra) and AWS (IAM)
• Ability to remove consumer group topic (start again)
• View log buttons from various screens
• Delete icon to Schema Registry versions table
• Debug Linux/MacOS/Windows scripts
• Ability to send null headers
• Ability to export, import, and reset settings on MacOS (previously Windows/Linux only)
• RPM package for Linux

Changed

• Using runtime instead of native image
• Issue submission max chars increase to 40k chars
• Improved logging format
• Validation icons coloured
• MacOS portable ZIP now contains standard app bundle and scripts outside of bundle

Deprecated

• Nothing

Removed

• Native image

Fixed

• ACL producer validation bug
• Kerberos configuration bug
• SASL example bug, some values remaining during example switch

Security

• Nothing

v0.0.11 (28-November-2024)

Added

• Debug startup scripts batch/shell scripts for Windows, Linux, MacOS
• Ability to view logs directly from some dialogs
• Ability to send null headers in an event/message
• Ability to unsubscribe/delete completely consumer topic offsets
• EXPERIMENTAL: Strimzi sasl.client.callback.handler.class support (io.strimzi.kafka.oauth.clientJaasClientOauthLoginCallbackHandler)

Changed

• Added delete icon on schema versions table column
• Better logging
• Ability to alter offsets directly from subscribed topics offsets tab (via context menu)
• Validation warnings and errors in colour

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Potential NPE when displaying topics if error determining offsets (due to Kafka version incompatibility or other error)
• ACL producer form validation bug
• No longer displaying SSL truststore config at times on schema registry or security, if SSL disabled (introduced 0.0.9)

Security

• Nothing

v0.0.10 (12-November-2024)

Added

• Open config file in text editor
• Report issues, feature requests, feedback from GUI or via browser
• Show logs folder, in console, or latest log in text editor
• Schema registry creation/update confirmation popup
• Search messages view tooltips / info
• Search messages pane collapsable checkbox
• Warnings if schema-encoded keys or values are detected without Schema Registry deserializer

Changed

• Rename from KafkaTopical to KafkIO
• Always create a config file even if no clusters configured
• Search messages search box right aligned

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Missing JSWBlend_ADDPeer hint on Linux caused errors/display
• Issue natively opening files on some Linux distros, now fall back to xdg-open
• Minor display/styling
• Honouring do not show hints setting in some dialogs

Security

• Nothing

v0.0.9 (05-November-2024)

Added

• Copy Kafka event details to clipboard from event/message table context menu
• Splash screen
• Full ACL administration capability

Changed

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Some style issues to prevent minor movement caused by buttons changing size

Security

• Nothing

v0.0.8 (24-October-2024)

Added

• Nothing

Changed

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Critical startup FileSystemNotFoundException error, where app fails to load on new installs
• Fixing run_console.bat on Windows, which incorrectly assumed "cat" exists by default on Windows machines

Security

• Nothing

v0.0.7 (23-October-2024)

Added

• Text search for schemas, messages, and produce message dialogs
• Schema Registry schema creation & editing

Changed

• Faster display of messages (modal popup time minimised)
• Cut/undo/redo/delete in produce message context menus
• Display improvements (compacting) for smaller screens
• Various performance improvements
• Various UI improvements

Deprecated

• Nothing

Removed

• Some undesired sout logging from time picker control

Fixed

• Schema ID and type fields' labels were mixed up on key/message value popups
• Minor performance improvements

Security

• Nothing

v0.0.6 (29-August-2024)

Added

• Topic deletion warning in the event where a deleted topic still persists

Changed

• Partition and offset info on lower message pane view, and popup

Deprecated

• Nothing

Removed

• Nothing

Fixed

• SASL SCRAM incorrect sasl.mechanism value bug fixed

Security

• Nothing

v0.0.5 (28-August-2024)

Added

• Consumer administration (at cluster or topic level)
• Consumer group delete
• Consumer offset reset earliest
• Consumer offset reset latest
• Consumer offset reset by timestamp
• Consumer offset reset by specified offsets

Changed

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Nothing

Security

• Nothing

v0.0.4 (13-August-2024)

Added

• Nothing

Changed

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Schema Registry reflection error
• Adding header to message reflection error
• macOs portable ZIP README.txt typos

Security

• Nothing

v0.0.3 (12-August-2024)

Added

• Create topics
• Alter topic settings
• Clear topic messages
• Delete topics
• Produce messages with key, value (empty and null), headers, and partition
• Serializer/deserializer support for unsigned 32-bit and 64-bit integers

Changed

• Files run.sh and README.txt now in macOS portable ZIP
• File README.txt now Linux portable ZIP
• clusters.yml format change seamless migration
• Clearly show difference between empty and null value in messages table and details views
• Better visual differentiation between line numbers and contents (i.e., a message)

Deprecated

• Nothing

Removed

• Reduced card shadow glow

Fixed

• Some info popup text improvements
• Config file reader less sensitive to unknown properties

Security

• Nothing

v0.0.2 (20-July-2024)

Added

• Nothing

Changed

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Accessibility tools/readers could trigger errors
• Some embedded binaries would fail to load due to MacOS security (third-party and not signed), and architectural naming conflicts. Notably snappy, lz4 & zstd binaries were affected.

Security

• Nothing

v0.0.1 (19-July-2024)

Added

• Configure/delete/edit cluster connections
• Test broker and schema registry connection
• SSL and SASL
• Logs, and rolling logs
• Event Log UI with ability to report an issue
• JKS Convert tool, to create JKS from other keystore types
• Health logger UI
• Memory-stick mode (configuration file stored by binary)
• Ability and warning to copy/overwrite existing config when flipping memory-stick mode
• Various key-bindings and shortcuts (configurable in a later release)
• Import and export configuration
• Proxy configuration, including custom SSL certs and ability to trust all
• Store password in O/S keychain
• Display settings (theme, font, hints)
• Global Kafka settings (timeouts, etc.)
• Cluster overview UI, showing version and enabled features and broker counts, general health, etc.
• Cluster broker UI
• Cluster topic and messages UI
• Advanced messages search, including by offset, dates, partition, and text
• Choice of key/value deserialization
• Decompression support for gzip, snappy, lz4, zstd
• Schema support for JSON, Protobuf, AVRO
• View keys/values as JSON, XML, Hex, or string, raw view
• View headers
• Cluster consumers UI
• Cluster schema registry UI with ability to see old schemas also
• Menu-item to show logs or config folders
• Menu item to open terminal in config folder
• Automatically check for latest version
• Opt-out of latest versions
• Ignore "this" update (until the next one)
• Debug mode
• About UI with version information
• Environment and system properties viewer
• CLI-mode
• Auto-detect running instances (prevent multiple instances running)
• Automatic cluster throttling (prevent too much I/O with brokers)
• Remember size of screen and various horizon/vertical split-pane positions

Changed

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Nothing

Security

• Nothing