The following list contains the new features added to Railo 3.3. The features are described in detail in the wiki.
| Title | Ticket |
| CFHTTP support for gzip compressed data | 276 |
| new feature: nested transactions | 689 |
| ENHANCEMENT: Update ParseDatetime() to handle HTTP time strings | 907 |
| new feature (RAILO 3.3.0.000) : flex configuration | 938 |
| new feature: argument includeEmptyFields | 1061 |
| new feature: cfscript-admin | 1074 |
| add support for function PrecisionEvaluate | 1075 |
| make argument count for function mid optional | 1087 |
| Support named arguments in built-in functions | 1094 |
| allow localmode to be set in application.cfc/cfapplication tag | 1114 |
| add possibility to assign admin plugins to every menu group | 1115 |
| add support for upload functions and tag | 1121 |
| getTickCount('nano') | 1122 |
| add support for placeholder {web-context-label} | 1135 |
| Datasource validation checkbox | 1140 |
| added support for SendGatewayMessage | 1144 |
| added support for xmlParent | 1153 |
| add function ImageFilter | 1156 |
| Support storage for the session scope | 1157 |
| add support for property/attributes sessiontype to appliation.cfc/cfapplication | 1163 |
| Function to reindex the custom tag and custom function library | 1173 |
| add support for ImageGetEXIF functions | 1174 |
| add support for "z" to lsTimeFormat pattern | 1181 |
| function SystemCacheClear | 1186 |
| cfmap addEvent function | 1188 |
| add support for range check for strings to isValid | 1200 |
| use session/client storage in a cluster environment | 1213 |
| cftrace follow object | 1227 |
| Author details on Atom Feed | 1232 |
| cfscript version of http | 1234 |
| use java Map as attributeCollection/argumentCollection | 1243 |
| reuse PreparedStatements | 1274 |
| dot notation ORM when defining relationships | 1275 |
| add support for additional tags in cfscript | 1297 |
| GZip compression for the Response Stream | 1300 |
| add function CreateUniqueId | 1302 |
| add S3 ACL Functions | 1322 |
| add more detailed architecture information to server scope | 1326 |
| allow a udf as value for attribute "filter" of tag cfdirectory-filter,cfobjectcache-filter | 1385 |
| Memory enhancements | 1396,1401 |
| Flag "use timeserver" in admin | 1399 |
| add Function objectSave | 1404 |
| add Function objectLoad | 1405 |
| Search mappings: Yes (cooming soon) | 1455 |
| cfinput-onerror | 1459 |
| make key attribute optional for cfindex-delete-custom | 1481 |
| client scope storage | 1479 |
| attribute validateparams from tag property does also allow a struct as input | |
| support for attribute storeACL to cfdirectory/cffile and storeLocation to cfdirectory | 1519 |