FlameGraph vs JSON Crack
A data-driven comparison of two Data visualization apps & tools: popularity, development activity, licensing and installation. Updated .
FlameGraphStack trace visualizer that generates interactive SVG flame graphs from profiling data.
JSON CrackVisualizes JSON, YAML, XML and CSV data as interactive graphs.
Key differences
- JSON Crack has 2.2× as many GitHub stars as FlameGraph (44.5K vs 19.8K).
- JSON Crack had more development activity over the last 12 months: 110 commits vs 0.
- FlameGraph is written primarily in Perl, JSON Crack in TypeScript.
- FlameGraph is the older project: its repository was created in 2011, JSON Crack's in 2022.
- FlameGraph has had no commits since Oct 20, 2024.
By the numbers
- FlameGraph
- JSON Crack
Show data as a table
| Metric | FlameGraph | JSON Crack |
|---|---|---|
| GitHub stars | 19,784 | 44,476 |
| Commits, last 12 months | 0 | 110 |
| Contributors | 61 | 38 |
| Forks | 2,110 | 3,570 |
Development activity
Commits per month to each default branch, last 12 complete months.
- FlameGraph
- JSON Crack
Show data as a table
| Month | FlameGraph | JSON Crack |
|---|---|---|
| Oct 2025 | 0 | 2 |
| Nov 2025 | 0 | 0 |
| Dec 2025 | 0 | 9 |
| Jan 2026 | 0 | 1 |
| Feb 2026 | 0 | 24 |
| Mar 2026 | 0 | 30 |
| Apr 2026 | 0 | 33 |
| May 2026 | 0 | 1 |
| Jun 2026 | 0 | 1 |
| Jul 2026 | 0 | 0 |
| Aug 2026 | 0 | 6 |
| Sep 2026 | 0 | 3 |
Side by side
| Attribute | FlameGraph | JSON Crack |
|---|---|---|
| Description | Stack trace visualizer that generates interactive SVG flame graphs from profiling data. | Visualizes JSON, YAML, XML and CSV data as interactive graphs. |
| Category | Data visualization apps & tools | Data visualization apps & tools |
| License | – | Apache-2.0 |
| Language | Perl | TypeScript |
| Status | Inactive | Active |
| Latest release | v1.0 () | v5.0.0 () |
| Last commit | ||
| Repository created | ||
| Open issues | 121 | 31 |
| Install | – | – |
Which should you choose?
Popularity and activity are only part of the story. Consider which ecosystem you work in, the chart types and interactions you need, how much data you render, and whether the license fits your project. Both tool pages list alternatives if neither is quite right.
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FlameGraph
Stack trace visualizer that generates interactive SVG flame graphs from profiling data.
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JSON Crack
Visualizes JSON, YAML, XML and CSV data as interactive graphs.