Decode
URL Decoder Online
Decode links, inspect query parameters and nested values, detect sensitive data, and copy a sanitized URL.
Open Tool21 tools · No signup
Development Tools
Open a tool and start working immediately. Your files and pasted data are processed locally in the browser.
Browse tools
Analyze
HAR Analyzer Online
Inspect requests, timings, failures, sensitive data, and AI-ready debug context from HAR files.
Open ToolCompare
JSON Diff Online
Compare JSON semantically, review nested changes, and export JSON Patch or regression context.
Open ToolFormat
YAML Formatter Online
Format and validate YAML locally while preserving comments, anchors, aliases, and structure.
Open ToolValidate
JSON Schema Validator Online
Validate JSON against modern JSON Schema drafts with detailed paths and local fix context.
Open ToolDebug
Regex Tester Online
Test JavaScript regular expressions, inspect groups, run cases, replace, and create debug context.
Open ToolCalculate
String Length Calculator Online
Count characters with and without whitespace, plus words, directly from pasted text.
Open ToolCalculate
Chmod Calculator Online
Convert Linux permissions between octal and symbolic modes, inspect special bits, and compare changes.
Open ToolConvert
Hex to ASCII Converter Online
Convert hexadecimal bytes to readable text, inspect byte diagnostics, and encode ASCII or UTF-8 back to hex.
Open ToolDecode
HTML Decoder Online
Decode named and numeric HTML entities, inspect multiple encoding layers, and keep decoded markup text-only.
Open ToolConvert
Unix Timestamp to Date Online
Convert Unix timestamps to UTC, browser-local, and ISO dates with unit detection and precision-safe diagnostics.
Open ToolConvert
Image to Base64 Converter Online
Convert images to Base64, Data URI, HTML, and CSS snippets locally in your browser with file size diagnostics.
Open ToolGenerate
Markdown Table Generator Online
Create, edit, paste spreadsheet or CSV data, align columns, and generate clean formatted Markdown tables locally.
Open ToolFormat
JSON Unescape Online
Unescape JSON strings, inspect escape sequences and multi-layer depth, verify JSON validity, and copy unescaped or pretty-formatted JSON locally.
Open ToolFormat
JSON Minifier Online
Minify JSON documents locally, validate syntax, preserve string literals and key order, compare size savings, and process batch JSON files.
Open ToolConvert
JSON to CSV Converter Online
Convert JSON arrays and objects to CSV locally, flatten nested data with dot notation, choose delimiters, download clean CSV, or convert CSV back to JSON.
Open ToolGenerate
JSON to JSON Schema Generator Online
Generate JSON Schema from JSON sample(s) locally, infer object and array types, review required fields, formats, and copy a Draft 2020-12 schema.
Open ToolSecurity
JWT Decoder Online
Decode JSON Web Tokens locally, inspect header and payload claims, review exp/iat/nbf timestamps, and check token structure without uploading.
Open ToolDebug
Certificate Decoder
Decode X.509 certificates, CSRs and chains online locally. Inspect Subject, Issuer, SANs, validity, public key, fingerprints, and hostname coverage.
Open ToolConvert
XML to JSON Converter
Convert XML to JSON locally, inspect mapping decisions, control arrays and namespaces, and review structural changes before export.
Open ToolConvert
XML to CSV Converter
Convert XML files and strings to CSV locally, detect record paths, map columns, flatten nested elements, and export safe CSV in browser.
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