--- title: Log Output Options description: Customize Logpush log output format and fields. image: https://developers.cloudflare.com/core-services-preview.png --- > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/logs/llms.txt > Use this file to discover all available pages before exploring further. [Skip to content](#%5Ftop) # Log Output Options Jobs in Logpush now have a new key, **output\_options**, which replaces **logpull\_options** and allows for more flexible formatting. You can modify **output\_options** via the API. ## Replace logpull\_options Previously, Logpush jobs could be customized by specifying the list of fields, sampling rate, and timestamp format in **logpull\_options** as [URL-encoded parameters](https://developers.cloudflare.com/logs/logpush/logpush-job/api-configuration/#options). For example: ``` { "id": , "dataset": "http_requests", "enabled": false, "name": "", "logpull_options": "fields=ClientIP,EdgeStartTimestamp,RayID&sample=0.1×tamps=rfc3339", "destination_conf": "s3://?region=us-west-2"} ``` We have replaced this with **output\_options** as it is used for both Logpull and Logpush. ``` { "id": , "dataset": "http_requests", "enabled": false, "name": "", "output_options": { "field_names": ["ClientIP", "EdgeStartTimestamp", "RayID"], "sample_rate": 0.1, "timestamp_format": "rfc3339" }, "destination_conf": "s3://?region=us-west-2"} ``` Updates replace output\_options in full When you update a Logpush job via `PUT /accounts/{account_id}/logpush/jobs/{job_id}` or `PUT /zones/{zone_id}/logpush/jobs/{job_id}`, the **output\_options** object is replaced entirely. Any field that was previously set but omitted from the update payload is reset to its default value. For example, if the existing job sets `timestamp_format: "rfc3339"` and your update only includes `field_names`, the job will revert to the default `timestamp_format` (`unixnano` for API-created jobs). Always include the complete **output\_options** object you want applied when updating a job. ## Output types By default Logpush outputs each record as a single line of JSON (also known as `ndjson`). With **output\_options** you can switch to CSV or single JSON object, further customize prefixes, suffixes, delimiters, or provide your own record template (in a stripped-down version of Go [text/template ↗](https://pkg.go.dev/text/template) syntax). The **output\_options** object has the following settings: * **field\_names**: array of strings. For the moment, there is no option to add all fields at once, you need to specify the fields names. * **output\_type**: string to specify output type, such as `ndjson` or `csv` (default `ndjson`). This sets default values for the rest of the settings depending on the chosen output type. Some formatting rules (like string quoting) are different between output types. * **batch\_prefix**: string to be prepended before each batch. * **batch\_suffix**: string to be appended after each batch. * **record\_prefix**: string to be prepended before each record. * **record\_suffix**: string to be appended after each record. * **record\_template**: string to use as template for each record instead of the default comma-separated list. All fields used in the template must be present in **field\_names** as well, otherwise they will end up as `null`. Format as a Go text/template without any standard functions (like conditionals, loops, sub-templates, etc.). The template can only consist of these three types of tokens: * Action: this is either a `{{ .Field }}` or a `{{ "constant text" }}`. * Text: this is just constant text in-between the `{{ actions }}`. * Comment: the `{{/* comments */}}` are silently dropped. * **record\_delimiter**: string to be inserted in-between the records as separator. * **field\_delimiter**: string to join fields. Will be ignored when **record\_template** is set. * **timestamp\_format**: string to specify the format for timestamps. Supported values are: * `unixnano` — nanoseconds unit * `unix` — seconds unit * `rfc3339` — seconds unit, for example: `2024-02-17T23:52:01Z` * `rfc3339ms` — milliseconds unit, for example: `2024-02-17T23:52:01.123Z` * `rfc3339ns` — nanoseconds unit, for example: `2024-02-17T23:52:01.123456789Z` Default timestamp formats apply unless explicitly set. The dashboard defaults to `rfc3339` and the API defaults to `unixnano`. * **sample\_rate**: floating number to specify sampling rate (default 1.0: no sampling). Sampling is applied on top of filtering, and regardless of the current sample\_interval of the data. * **CVE-2021-44228**: bool, default false. If set to true, will cause all occurrences of `${` in the generated files to be replaced with `x{`. ## Examples Specifying **field\_names** and **output\_type** will result in the remaining options being configured as below for the specified **output\_type**: ### ndjson Default output\_options for `ndjson` ``` { "record_prefix": "{", "record_suffix": "}\n", "field_delimiter": ","} ``` Example output\_options ``` "output_options": { "field_names": ["ClientIP", "EdgeStartTimestamp", "RayID"], "output_type": "ndjson"} ``` Example output ``` {"ClientIP":"89.163.242.206","EdgeStartTimestamp":1506702504433000200,"RayID":"3a6050bcbe121a87"}{"ClientIP":"89.163.242.207","EdgeStartTimestamp":1506702504433000300,"RayID":"3a6050bcbe121a88"}{"ClientIP":"89.163.242.208","EdgeStartTimestamp":1506702504433000400,"RayID":"3a6050bcbe121a89"} ``` * `ndjson` with different field names: Example output\_options ``` "output_options": { "field_names": ["ClientIP", "EdgeStartTimestamp", "RayID"], "output_type": "ndjson", "record_template": "\"client-ip\":{{.ClientIP}},\"timestamp\":{{.EdgeStartTimestamp}},\"ray-id\":{{.RayID}}"} ``` Example output ``` {"client-ip":"89.163.242.206","timestamp":1506702504433000200,"ray-id":"3a6050bcbe121a87"}{"client-ip":"89.163.242.207","timestamp":1506702504433000300,"ray-id":"3a6050bcbe121a88"}{"client-ip":"89.163.242.208","timestamp":1506702504433000400,"ray-id":"3a6050bcbe121a89"} ``` Literal with double curly-braces `({{}})`, that is, `"double{{curly}}braces"`, can be inserted following go text/template convention, that is, `"{{`doublecurlybraces`}}"`. ### csv Default output\_options for CSV ``` { "record_suffix": "\n", "field_delimiter": ","} ``` Example output\_options ``` "output_options": { "field_names": ["ClientIP", "EdgeStartTimestamp", "RayID"], "output_type": "csv"} ``` Example output ``` "89.163.242.206",1506702504433000200,"3a6050bcbe121a87""89.163.242.207",1506702504433000300,"3a6050bcbe121a88""89.163.242.208",1506702504433000400,"3a6050bcbe121a89" ``` ### csv/json variants Based on above, other formats similar to csv or json are also supported: * csv with header: Example output\_options ``` "output_options": { "field_names": ["ClientIP", "EdgeStartTimestamp", "RayID"], "output_type": "csv", "batch_prefix": "ClientIP,EdgeStartTimestamp,RayID\n"} ``` Example output ``` ClientIP,EdgeStartTimestamp,RayID"89.163.242.206",1506702504433000200,"3a6050bcbe121a87""89.163.242.207",1506702504433000300,"3a6050bcbe121a88""89.163.242.208",1506702504433000400,"3a6050bcbe121a89" ``` * tsv with header: Example output\_options ``` "output_options": { "field_names": ["ClientIP", "EdgeStartTimestamp", "RayID"], "output_type": "csv", "batch_prefix": "ClientIP\tEdgeStartTimestamp\tRayID\n", "field_delimiter": "\t"} ``` Example output ``` ClientIP EdgeStartTimestamp RayID"89.163.242.206" 1506702504433000200 "3a6050bcbe121a87""89.163.242.207" 1506702504433000300 "3a6050bcbe121a88""89.163.242.208" 1506702504433000400 "3a6050bcbe121a89" ``` * json with nested object: Example output\_options ``` "output_options": { "field_names": ["ClientIP", "EdgeStartTimestamp", "RayID"], "output_type": "ndjson", "batch_prefix": "{\"events\":[", "batch_suffix": "\n]}\n", "record_prefix": "\n {\"info\":{", "record_suffix": "}}", "record_delimiter": ","} ``` Example output ``` { "events": [ { "info": { "ClientIP": "89.163.242.206", "EdgeStartTimestamp": 1506702504433000200, "RayID": "3a6050bcbe121a87" } }, { "info": { "ClientIP": "89.163.242.207", "EdgeStartTimestamp": 1506702504433000300, "RayID": "3a6050bcbe121a88" } }, { "info": { "ClientIP": "89.163.242.208", "EdgeStartTimestamp": 1506702504433000400, "RayID": "3a6050bcbe121a89" } } ]} ``` ## How to migrate In order to migrate your jobs from using **logpull\_options** to the new **output\_options**, take these steps: 1. Change the `&fields=ClientIP,EdgeStartTimestamp,RayID` parameter to an array in `output_options.field_names`. 2. Change the `&sample=0.1` parameter to `output_options.sample_rate`. 3. Change the `×tamps=rfc3339` parameter to `output_options.timestamp_format`. 4. Change the `&CVE-2021-44228=true` parameter to `output_options.CVE-2021-44228`. For example, if logpull\_options are `fields=ClientIP,EdgeStartTimestamp,RayID&sample=0.1×tamps=rfc3339&CVE-2021-44228=true`, the output\_options would be: ``` "output_options": { "field_names": ["ClientIP", "EdgeStartTimestamp", "RayID"], "sample_rate": 0.1, "timestamp_format": "rfc3339", "CVE-2021-44228": true} ``` ```json {"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/logs/logpush/logpush-job/log-output-options/#page","headline":"Log Output Options · Cloudflare Logs docs","description":"Customize Logpush log output format and fields.","url":"https://developers.cloudflare.com/logs/logpush/logpush-job/log-output-options/","inLanguage":"en","image":"https://developers.cloudflare.com/core-services-preview.png","dateModified":"2026-06-17","publisher":{"@type":"Organization","name":"Cloudflare","url":"https://www.cloudflare.com/"},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/logs/","name":"Logs"}},{"@type":"ListItem","position":3,"item":{"@id":"/logs/logpush/","name":"Logpush"}},{"@type":"ListItem","position":4,"item":{"@id":"/logs/logpush/logpush-job/","name":"Logpush job setup"}},{"@type":"ListItem","position":5,"item":{"@id":"/logs/logpush/logpush-job/log-output-options/","name":"Log Output Options"}}]} ```