/srv/datademon/tools
Fast browser tools for inspecting data and checking changes. No account, no server round-trip, and no complicated workflow—just paste, inspect, and keep moving.
/directory
Paste or upload JSON to format, validate syntax, minify, search, and explore it as a collapsible tree. Edit up to 20 MiB or inspect selected files up to 4 GiB in bounded file-backed mode, without uploading them.
Open JSON Viewer & FormatterConvert pasted CSV or files into clean JSON with delimiter detection, reliable quoted-field parsing, headers, and optional value inference.
Convert CSV to JSONConvert JSON to YAML or YAML 1.2 back to formatted or minified JSON with strict duplicate-key and alias safety checks.
Convert JSON and YAML
Generate idiomatic Go structs with nested types, JSON tags, merged array samples, optional pointers, and omitempty.
Infer interfaces or type aliases with nested definitions, optional properties, unions, null handling, exports, and readonly output.
Generate TypeScript TypesStream, search and filter operational logs with format detection, request evidence, likely-exposure findings and explicit local redaction.
Open Log ViewerValidate newline-delimited JSON per record, inspect malformed lines and inferred fields, and export filtered or explicitly redacted JSONL.
Open JSONL ViewerInspect HTTP request timings, headers, cookies and likely credential exposure before sharing a filtered and sanitized HAR.
Open HAR ViewerDecode standard, URL-safe, padded, unpadded, or Base64 data URL values as strict UTF-8, or encode Unicode text.
Open Base64 ToolFind JWTs in tokens, JSON API responses, or bearer headers; decode claims and verify HMAC, RSA, RSA-PSS, or ECDSA signatures locally.
Decode and Verify JWTInspect EXIF, XMP, IPTC, GPS, SHA-256 hashes, privacy exposure, and image-container structure. Prepare a metadata-sanitized copy without uploading the original.
Inspect Image MetadataCrop, rotate, flip, and resize JPEG, PNG, or WebP images locally. Export a separately hashed derivative while retaining the original file.
Resize or Crop an ImageCompare two texts or files with side-by-side and unified views, inline changes, ignore options, and downloadable diffs.
Open Text CompareBatch-resize JPEG, PNG and WebP by pixels, percentage or presets with no-upscale and aspect-safe defaults.
Resize ImagesCompress by encoder quality or target KB, preserving dimensions unless downscaling is explicitly allowed.
Compress ImagesGenerate Pydantic v2 models, keyword-only dataclasses or TypedDict definitions from representative JSON.
Generate Python ModelsGenerate Java 17 records or POJO classes with optional Jackson annotations in one root file.
Generate Java ModelsGenerate C# 12 records or classes with nullable evidence and System.Text.Json aliases.
Generate C# ModelsStream RFC 4180 rows, virtualise cells, profile columns and export bounded edits or redactions locally.
Open CSV ViewerCalculate, split and aggregate IPv4 or IPv6 CIDRs with BigInt precision and optional cloud reservations.
Calculate an IP RangeConvert seconds through nanoseconds, discover timestamps in JSON or logs and resolve DST explicitly.
Convert EpochsExplain Unix five-field cron and enumerate timezone-aware next runs in a cancellable worker.
Build a Cron ScheduleValidate JSON against Draft 2020-12, 2019-09 or Draft 7, or infer a conservative schema from representative data. Remote references are never fetched.
Validate a JSON SchemaCompare JSON semantically, search JSON Pointer changes and generate or atomically apply RFC 6902 patches.
Compare JSONConvert root or nested arrays of objects to RFC 4180 CSV in two bounded passes, with file-backed support up to 4 GiB.
Convert JSON to CSVRemove likely secrets, tokens, cookies and PII from logs, JSONL and HAR locally, then create a verified derivative and content-free report.
Sanitise Diagnostic Data/why/local
Your structured data, encoded values, images, metadata, and text are processed locally. Input content is not sent to Data Demon or included in analytics events.
There is no application framework or server-side processing. Large operations use dedicated browser workers to keep the interface responsive.