Guides by runtime

Fast entrypoints for troubleshooting guides and no-upload workflows by ecosystem.

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Node.js

JSON.parse errors, encoding issues, and conversion workflows for Node.js.

Open 50 guides

Java

Jackson/Gson parsing and deserialization pitfalls, plus safe local workflows.

Open 103 guides

C#

Newtonsoft.Json and System.Text.Json errors and fixes (no upload).

Open 629 guides

PHP

json_decode / encoding errors, and practical fixes before conversion.

Open 58 guides

Ruby

JSON::ParserError, YAML (Psych), and CSV parsing gotchas and fixes.

Open 42 guides

Rust

serde_json parse/type errors and safe debugging workflow.

Open 154 guides

Python

json / YAML / XML / CSV parsing errors and fast local validation steps.

Open 93 guides

Go

encoding/json and YAML parsing errors, with a repeatable fix workflow.

Open 411 guides

FAQ

Is anything uploaded? No. Pages link to local tools that run in your browser (NO UPLOAD).

Where should I start? Pick your runtime, open the guides list, and start with the exact error message you see. Then validate/repair locally and re-validate.

Fast triage path by runtime

Use this index to reduce time-to-fix: start from your runtime card, open the matching error guide, validate raw input locally, and only then convert/export. This sequence prevents cascading parse failures.

1) Copy exact error text
2) Open runtime guide
3) Validate raw input locally
4) Fix first failing token/field
5) Re-validate and export

Related by intent

How to fix “JSON.parse” errors (and avoid them next time) Single quotes vs double quotes: common JSON mistakes Trailing commas in JSON: why they break parsing (and fixes) Fix invalid Unicode escapes in JSON (no upload)

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