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Paste JSON
Bring in API responses, CSV exports, or sample payloads.
JSON transformation tool
Transform JSON Visually – Build Reusable Workflows
Transform JSON online with a visual workflow tool. Drag steps, connect them, and turn repeated cleanup, merging, and conversion into reusable pipelines — no code.
Build the workflow once on a visual canvas, then rerun it on new JSON whenever the next messy payload lands — no scripts, no glue code, no re-work.
No sign up required • Try it instantly
Transform JSON online in your browser — no setup required
Clean and redact JSON in a visual workflow
Visual JSON transformation
See how JSON transforms from input to output
Drop your JSON on the canvas, connect a few transformation steps, and watch the output update as you build. Runs entirely in your browser — no data leaves the page.
Rename Keys → Clean → Normalize → Redact — reusable on any matching payload.
Transform JSON Now →
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How it works
From raw JSON to clean output in four steps
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Add transformation steps (merge, clean, convert)
Drag reusable utilities onto the canvas from a searchable library.
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Connect them
Wire step outputs to step inputs — data flows through automatically as you edit.
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Get clean, reusable output
Export the result, or save the pipeline and rerun it on the next payload.
What you can do
Turn repeated JSON work into reusable workflows
Stop writing one-off scripts for every cleanup, merge, or export. Build the pipeline once, share it, and rerun it whenever the data changes.
Merge multiple JSON files
Combine payloads from APIs, exports, or services into one coherent document with predictable conflict resolution.
Clean and normalize API responses
Strip nulls and empty strings, trim whitespace, align casing, and coerce types so downstream code sees consistent data.
Convert CSV ↔ JSON
Parse vendor CSV exports into structured JSON, or flatten JSON arrays into tabular CSV for analytics pipelines.
Remove sensitive fields (PII redaction)
Mask emails, phones, SSNs, addresses, and IPs with a single step before sharing logs, bug reports, or exports.
Compare two JSON responses
Diff payloads across versions, environments, or runs to find regressions before they reach production.
Flatten nested structures
Turn deeply nested objects into flat, predictable records for CSV export, spreadsheet review, or downstream joins.
Why ForgeJSON transformation
Not just a formatter. A JSON workflow tool.
ForgeJSON is built for the repeatable JSON work that normally turns into throwaway scripts: merging, cleaning, converting, redacting, comparing, and flattening. Build the workflow once, keep using it.
Merge
Clean
Convert
Redact
Compare
Flatten
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Common workflows
Common JSON transformation workflows
Use ForgeJSON to automate the cleanup, reshape, and export steps that show up in every data-heavy project.
Clean unstable API payloads before shipping
Normalize fields coming from third-party APIs that change shape between requests, so your code sees a steady interface.
Redact customer PII before sharing a bug report
Mask personally identifiable fields across a whole payload in one pass, then safely send the sample to support or engineering.
Convert vendor CSV exports into JSON
Parse supplier feeds, add computed fields, and reshape into the structure your ingestion pipeline expects.
Merge JSON from multiple microservices
Join customer, order, and payment payloads into a unified record without writing glue code.
Diff two API responses to find regressions
Compare today versus yesterday for the same request and surface only the fields that actually changed.
Flatten nested config files for tabular inspection
Unpack deeply nested settings into a flat list of paths so audits and reviews fit in a spreadsheet.
Want more ideas before you jump in? Read JSON workflow guides on the ForgeJSON blog or compare plans on the pricing page.
From edits to workflows
Already editing JSON?
Turn repeated edits into a pipeline →
If you keep making the same fixes by hand in the JSON editor, a pipeline does them once and replays the work on the next payload. Same scenario, different surface.
No sign up required • Try it instantly
Try ForgeJSON in your browser
Build a JSON transformation workflow without writing code.
Open the pipeline demo, drop in sample JSON, and test transformations without creating an account.
No sign up required • Try it instantly
FAQ
Frequently asked questions
What is a JSON transformation tool?
A JSON transformation tool lets you clean, reshape, merge, and convert JSON data without writing code — you drag reusable steps onto a canvas, connect them, and run the workflow on any matching payload.
How do I convert CSV to JSON online?
Paste or upload a CSV, add a Parse CSV step, then optional cleanup and restructure steps to land in the shape you want. Re-run the same pipeline on new CSVs without rebuilding it.
Can I merge multiple JSON files?
Yes. Add two inputs, connect them to a Merge step, and choose how conflicting keys are resolved. The merged output flows into the rest of your pipeline like any other step.
Can I reuse my transformations?
Yes. You can rerun the same workflow on new JSON data.
Is ForgeJSON free to use?
Yes. You can use the pipeline demo and the JSON editor for free, directly in your browser, without creating an account.
Do I need to install anything?
No. ForgeJSON runs entirely in your browser — no download, no install, no build tooling.
Is my JSON data saved in the demo?
No. Demo data stays in your browser and is not stored.