JSON cumulative sum
ClientRunning totals for time-series or ledger-style row arrays.
Learn more: cumulative sum
Adds `{field}_cumsum` on each row.
Local processing
Parsing and output formatting run entirely in your browser—nothing is uploaded for this transform.
Input
?
Paste JSON, then read transformed output below.
Nearby workflows on Toolcore
- JSON running average — Add expanding average column `{field}_runavg` for one numeric field—local stats. once JSON text parses on this page.
- JSON sum field — Sum one numeric field across an array of objects—local quick aggregate. once JSON text parses on this page.
- JSON percent of total — Add each row's share of the column total as `{field}_pct`—local analytics. once JSON text parses on this page.
- JSON formatter — JSON format online: pretty-print, minify, validate, escape, download . once JSON text parses on this page.
Common use cases
- Running totals for time-series or ledger-style row arrays.
Common mistakes to avoid
Invalid JSON
Fix parse errors before expecting output.
FAQ
Is data uploaded?
No—all parsing and transforms run locally.
How is this different from jq?
This page focuses on one deterministic task without a filter language.
More tools
Related utilities you can open in another tab—mostly client-side.
JSON running average
ClientAdd expanding average column `{field}_runavg` for one numeric field—local stats.
JSON sum field
ClientSum one numeric field across an array of objects—local quick aggregate.
JSON percent of total
ClientAdd each row's share of the column total as `{field}_pct`—local analytics.
JSON formatter
ClientJSON format online: pretty-print, minify, validate, escape, download .json.