Convert newline-delimited JSON streams to JSON arrays for analysis. Turn 10,000 log lines into queryable data — local conversion, free, no signup.
Content reviewed October 2026 · About Toolzum
Flatten JSON objects into URL query strings — nest with bracket notation. Build ?filter[x]=1 links from API objects — local conversion, free, no signup.
Parse Set-Cookie headers into structured JSON, or analyze cookie security flags (Secure, HttpOnly, SameSite, expiry). Flag missing Secure, HttpOnly, and SameSite attributes — free, local, no signup.
Decode MessagePack binary into readable JSON structures. Debug compact payloads without hex dumps — local decoding, free, no signup.
Convert CSV rows to newline-delimited JSON for streaming pipelines and log systems. Feed Kafka without reformatting — local conversion, free, no signup.
Turn plain-text lines into spaced Markdown paragraphs. Non-empty lines are trimmed and joined with blank lines — local conversion, free, no signup.
NDJSON streams one object per line (logs, exports); arrays wrap everything in brackets. Convert stream→array for jq and browser tools.
Tens of thousands of lines convert locally in seconds. Million-line dumps split by time window first.
Bad lines report with line numbers while valid ones convert — fix or drop the flagged rows, don't lose the batch.
No — conversion runs locally in your browser. Data never leaves your device.
JSONL Formatter
Format JSON Lines files with per-line pretty-printing and validation. Read streaming logs like structured data — local processing, free, no signup.
JSON Formatter
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.