Encoding & Formatting
25 tools
Convert and format data between different encodings and formats
Base64 Decoder & Encoder
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Decode and encode Base64 online for free. Real-time conversion with full UTF-8 and emoji support. 100% private — runs in your browser. No signup needed.
Base64 to Image Converter
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Decode a Base64 string or data URI back into an image in your browser. Preview, read dimensions & MIME, then download as PNG, JPG, GIF, SVG. No upload.
CSV to JSON Converter
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Convert CSV to JSON in your browser. RFC 4180, type inference, header row, big-int safe. 100% private, no upload.
.env to JSON Converter
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Paste a .env file, get JSON instantly. Your database passwords, API keys and tokens never leave your browser — 100% private, no upload, free dotenv parser.
Free HTML Entity Decoder — Unescape HTML
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Decode HTML entities and unescape HTML online — free, no signup, 100% in your browser. Converts named, decimal & hex references back to characters; never uploaded.
Free HTML Entity Encoder — Escape HTML
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Encode HTML entities and escape special characters (< > & " ') online — free, no signup, 100% in your browser. Named, decimal, or hex output; never uploaded.
HTML to Markdown Converter
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Convert HTML to clean Markdown in your browser — GFM tables, task lists, and links. Choose ATX/Setext headings and inline or reference links. Great for migrating web content or feeding LLMs. 100% private, no upload.
Image to Base64 Converter
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Convert images to Base64 data URIs in your browser — PNG, JPG, GIF, WebP, SVG, ICO. Copy HTML, CSS, Markdown & JSON, with the exact size increase. 100% private, no upload.
JSON Diff & Compare
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Compare two JSON files instantly in your browser. Side-by-side highlighting, RFC 6902 JSON Patch output, ignore noisy fields like timestamps and IDs. 100% private, no upload.
JSON Escape
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Escape any text or JSON into a valid JSON string literal in your browser. Handles quotes, newlines, tabs, Unicode, and slashes. 100% private, no upload, instant.
JSON Formatter & Validator
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Format, validate and beautify JSON instantly in your browser. Free online tool with syntax validation, error detection, minify and one-click copy. 100% private.
JSON Schema Validator
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Validate JSON against any JSON Schema instantly in your browser. Supports Draft 2020-12, 2019-09, and Draft-07 with path-precise error messages. 100% private — no upload, no account, free.
JSON to CSV Converter
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Convert JSON to CSV in your browser. RFC 4180, Excel-EU, TSV, Pipe presets. Flatten nested or stringify. 100% private, no upload.
JSON to .env Converter
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Paste a JSON object, get a .env file instantly. Generate dotenv from config locally — your keys and secrets never leave your browser. 100% private, no upload.
JSON to TypeScript Converter
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Paste JSON, get TypeScript interfaces instantly. 100% in your browser — data never leaves the page. interface or type, nested objects, arrays, optional fields. Free, no sign-up.
JSON to XML Converter
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Paste JSON, get XML instantly. Converts objects, arrays, and @_ attributes in-browser — nothing uploaded. Free, private, no signup required.
JSON to YAML Converter
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Paste JSON, get YAML instantly. Live conversion in your browser. K8s/Compose-ready, 2/4-space indent, smart quoting. 100% private, no upload.
JSON Unescape
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Unescape a JSON string back to readable text in your browser. Decodes \n, \t, \", \\, and \uXXXX, with or without surrounding quotes. 100% private, no upload.
Free JSONPath Tester — Evaluate Queries Online
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Test JSONPath expressions against any JSON, 100% private in your browser — no upload, no signup, no eval. RFC 9535 standard engine plus Classic Goessner mode, with Values, Paths and Both result views.
Markdown to HTML Converter
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Convert Markdown to HTML in your browser — full GitHub Flavored Markdown, live preview, syntax highlighting. Export an HTML fragment, full document, or email-safe inline-styled HTML. 100% private, no upload.
QR Code Generator — URL, WiFi, vCard, Email, SMS, Geo
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Free QR code generator. Make static QR codes for URL, WiFi, vCard, email & SMS. SVG & PNG download. No expiration, no signup, 100% in your browser.
URL Encoder & Decoder with Built-in URL Parser
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Decode or encode URLs in real time with built-in URL parser. Dual mode: encodeURI & encodeURIComponent. 100% private, no data sent to any server.
XML Formatter
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Beautify, minify, and validate XML in-browser — nothing uploaded. Re-indents messy XML, reports well-formedness errors with line/column. Free, private, no signup.
XML to JSON Converter
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Paste XML, get JSON instantly. Converts attributes to @_ keys, handles repeated elements as arrays. 100% in-browser, nothing uploaded, no signup.
YAML to JSON Converter
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Paste YAML, get JSON instantly. Live conversion in your browser. K8s manifests, OpenAPI specs, helm values supported. 100% private, no upload.