SyntaxError: Unterminated string in JSON at position 10: what it means and how to fix it
Fix JSON parsing error (Unterminated string in JSON at position 10): what it means, top causes, and a no-upload workflow to validate and repair JSON locally.
Unterminated string in JSON
Fix Unterminated string in JSON. Validate strict JSON locally, pinpoint the exact break, then format/repair and re-validate (no upload).
TL;DR: Validate locally, pinpoint the failing spot, apply the minimal fix, then validate again.
Fast no-upload workflow
- Validate the input (strict rules, correct encoding, correct delimiter/quotes).
- Locate the exact position/line reported by the parser or validator.
- Fix the smallest broken part (often a quote, escape, delimiter, or a truncated copy/paste).
- Re-validate and only then convert/export.
Recommended tools
- JSON Validator
- JSON Repair
- JSON Formatter
- JSON String Escape/Unescape
- NDJSON/JSONL Converter
- JSON to CSV
- JSON to XML
Relevant guides
This list is auto-picked from existing guides. If you don’t see your exact case, use: search guides for “unterminated string newline in string json parse error”.
JSON.parse: unterminated string at line 1 column 10 of the JSON data: causes and fixes
Firefox JSON.parse error (unterminated string at line 1 column 10 of the JSON data): how to use line/column to pinpoint the issue and validate JSON locally (no upload).
JSONDecodeError: Unterminated string starting at: line 1 column 10 (char 9): what it means and how to fix it
Python json JSONDecodeError (Unterminated string starting at: line 1 column 10 (char 9)): common causes (empty input, extra data, encoding) and fast fixes with local validation (no upload).
json.decoder.JSONDecodeError: Unterminated string starting at: line 1 column 10 (char 9): what it means and how to fix it
Python json.decoder JSONDecodeError (Unterminated string starting at: line 1 column 10 (char 9)): common causes (empty input, extra data, encoding) and fast fixes with local validation (no upload).
simplejson.errors.JSONDecodeError: Unterminated string starting at: line 1 column 10 (char 9): what it means and how to fix it
Python simplejson JSONDecodeError (Unterminated string starting at: line 1 column 10 (char 9)): common causes (empty input, extra data, encoding) and fast fixes with local validation (no upload).
How to fix “JSON.parse” errors (and avoid them next time)
Learn how to troubleshoot JSON.parse errors like “Unexpected token” and validate JSON safely. Includes quick fixes and a no-upload validator.
Fix newlines in JSON strings (no upload)
How to represent newlines correctly inside JSON strings and avoid parse errors.
Trailing commas in JSON: why they break parsing (and fixes)
Trailing commas are a top cause of JSON.parse errors. Learn where they appear, how to spot them quickly, and validate JSON locally (no upload).
Escape / unescape JSON strings (no upload)
How to escape plain text into a valid JSON string literal (and unescape it back) without uploading data to online converters.
“Unexpected token” in JSON: what it means and how to fix it
What “Unexpected token” means in JSON.parse errors, how to find the breaking character, and how to validate JSON locally in your browser (no upload).
Search tools by keyword
Open tools search for “unterminated string newline in string json parse error”.
Related subtopics
- UTF-8 BOM breaks JSON parsers
- Validate JSON before exporting
- Big integers and precision loss
- Unexpected token in JSON
- Unexpected end of JSON input
- Unexpected character in JSON
Related by intent
- Intent hub for Unterminated string in JSON
- Execution playbook
- Method comparison
- Alternative flows
- Migration path
- Benchmark baseline
- Case study
- Trend report
- Cluster pillar
- Cross-cluster pillar: CSV
- Linkable data asset
Expert signal
Expert note: Unterminated string in JSON usually resolves fastest when triage starts from strict validation and then branches to comparison/alternative paths based on input quality.
Data snapshot 2026
| Metric | Value |
|---|---|
| Intent confidence score | 82/100 |
| Predicted CTR uplift potential | 17% |
| Target crawl depth | < 3 clicks |
Trust note: All processing happens locally in your browser. Files are never uploaded.
FAQ (quick)
Start here: JSON Validator (runs locally, no upload).
Can I fix Unterminated string in JSON without uploading my data? Yes. no-upload.ru tools run locally in your browser (NO UPLOAD). Start with JSON Validator and keep samples redacted if you must share them.
What is the fastest safe workflow? Validate first, fix the smallest broken part, then validate again before converting/exporting. This prevents silent downstream issues.
Why does Unterminated string in JSON happen? Most issues come from copy/paste truncation, wrong encoding, non-strict syntax (comments/trailing commas), or a shape mismatch (array vs object).
Which tool should I start with for Unterminated string in JSON? Start with JSON Validator. If you still see errors, follow the related playbook/trend report on this page.
Privacy & Security
All processing happens locally in your browser. Files are never uploaded.