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Inspect and transform structured data without uploading it.
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23 practical tools
JSON formatter & validatorFeaturedValidate, pretty-print, or minify JSON locally in your browser.AI token cost plannerEstimate costs using your own token counts and prices.Base64 encoder & decoderEncode or decode Unicode text locally without sending it anywhere.SHA checksum calculatorCalculate SHA-256, SHA-384 or SHA-512 for text and compare a reference checksum.Context budgetReserve output space using explicit token counts.CSV ↔ JSON converterConvert tabular data with quoted fields, headers and Unicode intact.Website and domain name generatorTurn a project name or a few words about your idea into website and domain name suggestions you can copy. Generated locally; check availability before registering.Offline JSON Schema validatorValidate JSON against a supported draft 2020-12 subset.Local JWT decoderRead a compact JWT header and payload locally without verifying claims.Markdown preview and HTML exportPreview Markdown in your browser, including tables and strikethrough, then copy or download HTML without sending your text to a server.MCP configuration checkerCheck a declared portable JSON configuration subset without running servers.Password GeneratorGenerate random passwords locally with your chosen length and character sets.QR Code StudioCreate QR codes for links, Wi-Fi and contacts, then download PNG or SVG.RAG size estimatorEstimate overlapping chunks and raw vector storage.JavaScript Regex TesterTest a JavaScript pattern against text and inspect matches, positions and capture groups.Temporary URL shortenerCreate a short link that expires after 24 or 48 hours. No account needed.Exact text token counterCount plain text with the pinned cl100k_base encoding.URL Encoder / DecoderEncode or decode URL text without sending your links to a server.URL inspector and tracking cleanerInspect a URL and remove only the tracking parameters you select.Campaign URL Builder — UTM LinksAdd UTM source, medium and campaign tags to your URL, then copy the finished link. Existing destination parameters are preserved.UUID v4 generatorGenerate random UUID v4 identifiers in your browser.XML checker and formatterCheck XML 1.0 well-formedness and optionally format it locally.YAML ↔ JSON converterConvert JSON-compatible YAML data and strict JSON locally without changing Unicode text.