transform.tools is an open-source (MIT) polyglot converter by Ritesh Kumar, built for code-to-code jobs: JSON Schema, GraphQL, SVG to JSX, TypeScript and Flow. LocalFirstTools covers JSON, YAML, CSV, XML and TypeScript inference inside a 28-tool local-only toolkit. Use transform.tools for compiler-shaped transforms; use LocalFirstTools for data you would rather not paste into a general converter.
Last updated , factual comparison, no affiliate links.
The short verdict: transform.tools is the right site for compiler-shaped jobs, JSON Schema, GraphQL, SVG to JSX, Flow, Protobuf. LocalFirstTools is the right site for data you would rather keep in the tab: JSON, YAML, CSV, XML, JWTs, hashes. Overlap exists (JSON to TypeScript, JSON/YAML/XML) and both can be the better fit depending on the payload.
| LocalFirstTools | transform.tools | |
|---|---|---|
| Focus | 28 data and text tools | Polyglot code converters (many routes) |
| JSON Schema / GraphQL / SVG | Not shipped | First-class transformers on the homepage |
| JSON / YAML / XML / CSV | Format, validate, diff, CSV viewer, converters | Some JSON/YAML/TOML routes; not a CSV viewer |
| License | Proprietary; source is private | MIT, public GitHub, self-host documented |
| Local processing | Yes, with a published DevTools check | Client-side app; verify the transform you run |
| Account / ads | None | None required |
transform.tools, created by Ritesh Kumar (@ritz078), is a polyglot web converter. The homepage is the product: SVG to JSX, HTML to Pug, JSON Schema to TypeScript, GraphQL to fragments, CSS to JS objects, TypeScript to Flow. The GitHub repository is MIT-licensed and documents self-hosting. Tutorials cite those routes because they are specific landing pages for a compiler-shaped job.
LocalFirstTools overlaps on a few conversions, JSON to TypeScript interfaces, JSON ↔ YAML, JSON ↔ XML, and then goes somewhere else: format and validate JSON, view CSV, decode JWTs, hash files, mint UUID v7. If you arrived with a JSON Schema, transform.tools is the honest recommendation.
Every route LocalFirstTools does not have: GraphQL, Protobuf, OpenAPI, SVG, Flow, CSS-in-JS. Open source. Self-host. That is a long list, and this comparison would be dishonest if it skipped it.
Data you would not paste into a general code converter: a customer CSV, a live-looking JWT, an API payload you want to pretty-print with an exact error line. The no-upload check is written down. Measurements for minify and Base64 live on /stats. Use transform.tools for schemas and components; use this site for documents and tokens.
Try the local-only way
Generate TypeScript interfaces from a JSON sample. Nothing is uploaded, verify it in your network tab.
Code-to-code conversion. The homepage is a grid of transformers: SVG to JSX, JSON Schema to TypeScript or Protobuf, GraphQL to fragments, CSS to JS objects, Flow to TypeScript, and many others. It is a polyglot converter, not a JSON formatter with extra tabs.
Yes. Ritesh Kumar's ritz078/transform is MIT-licensed and self-hostable. LocalFirstTools is proprietary; the source repository is private and is not offered as an open-source project.
transform.tools is a client-side Next.js app in the public repository; still watch the network tab for the transform you run. LocalFirstTools publishes a DevTools procedure for the same check. Neither needs an account for the core converters.