// Tools

Encoding

./base64-encoder
Base64 Encoder
Encode text or files to Base64 directly in your browser. URL-safe mode, MIME line splitting, and file upload — nothing is ever sent to a server.
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./base64-decoder
Base64 Decoder
Decode Base64 strings or files back to their original bytes in your browser. URL-safe input, file download, and live-mode preview — no upload.
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./url-encoder
URL Encoder
URL-encode (percent-encode) text directly in your browser. Live mode, RFC 3986 reserved characters, and query-string aware. Nothing leaves the tab.
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./url-decoder
URL Decoder
URL-decode (percent-decode) text directly in your browser. Live mode, malformed-input warnings, and query-string aware. Nothing leaves the tab.
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./url-parser
URL Parser
Parse any URL into protocol, host, port, path, query parameters, and fragment in your browser. Edit any part and rebuild a valid URL.
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./html-entity-codec
HTML Entity Codec
Encode raw text to HTML entities and decode named or numeric entities back to text in your browser. Pick named, decimal, or hex output.
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./gzip-compressor
GZIP Compressor
Compress text and files with GZIP directly in your browser using the native CompressionStream API. Output follows RFC 1952 and works with gunzip.
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./gzip-decompressor
GZIP Decompressor
Decompress .gz files and GZIP-encoded payloads in your browser with the native DecompressionStream API. Accepts any RFC 1952 input from gzip or gunzip.
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./hex-ascii-converter
Hex ↔ ASCII Converter
Convert text to hexadecimal bytes and decode hex back to text in your browser. UTF-8 or Latin-1, four grouping modes, 0x prefix, upper or lower case.
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Format

./json-formatter
JSON Formatter
Format, validate, and minify JSON in your browser. Pretty-print with 2-space, 4-space, or tab indentation; parse errors surface line and column hints.
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./xml-formatter
XML Formatter
Format and minify XML in your browser. Pretty-print with 2-space, 4-space, or tab indentation, surface parse errors with line and column hints — nothing is uploaded.
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./sql-formatter
SQL Formatter
Pretty-print SQL queries across 10+ dialects (MySQL, PostgreSQL, SQLite, T-SQL, BigQuery, Snowflake, Redshift). Configurable indent, keyword case, live mode. Browser-only.
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./html-beautifier
HTML Beautifier
Pretty-print minified or messy HTML in your browser. Pick indent size, line wrap, and blank-line limits, and optionally reformat inline CSS and JS.
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./js-beautifier
JavaScript Beautifier
Beautify minified or messy JavaScript in your browser. Pick indent size, brace style, and blank-line limits. Lazy-loaded so your page stays fast.
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./css-beautifier
CSS Beautifier
Beautify minified or messy CSS in your browser. Pick indent size, brace style, and blank lines between rules. Lazy-loaded so your page stays fast.
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./jsonpath-tester
JSONPath Tester
Test JSONPath expressions against your JSON in the browser. Output matched values, paths, or RFC 6901 Pointers. Safe by default: no eval, no upload.
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Minify

./json-minifier
JSON Minifier
Minify JSON in your browser. Strips all insignificant whitespace and reports original size, minified size, and byte savings — nothing is uploaded.
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./html-minifier
HTML Minifier
Minify HTML in your browser. Collapses whitespace, strips comments, collapses boolean attributes, and reports byte savings — nothing is uploaded.
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./js-minifier
JavaScript Minifier
Minify JavaScript in your browser with Terser. Mangle, dead-code elimination, ES2020+ syntax. Lazy-loaded so your page stays fast.
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./css-minifier
CSS Minifier
Minify CSS in your browser. Strips comments and whitespace, collapses hex colors, removes zero units, reports byte savings — nothing is uploaded.
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Convert

./json-csv-converter
JSON to CSV Converter
Convert JSON to CSV in your browser. RFC 4180 quote handling, nested-object flattening, configurable delimiter and header columns — nothing is uploaded.
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./csv-to-json
CSV to JSON Converter
Convert CSV to JSON in your browser. RFC 4180 quote handling, delimiter auto-detect, header-row keys, and type coercion — nothing is uploaded.
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./json-yaml-converter
JSON ↔ YAML Converter
Convert JSON to YAML and YAML to JSON entirely in your browser. Multi-document YAML, anchors and aliases, configurable indent — nothing is uploaded.
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./json-to-typescript
JSON to TypeScript
Paste a JSON sample and get TypeScript interfaces. Nested objects, arrays, unions, optionals, readonly — all inferred in your browser.
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./xml-json-converter
XML ↔ JSON Converter
Convert XML to JSON and JSON to XML in your browser. Configure attribute prefix, text-node key, indent, and array handling. Nothing is uploaded.
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./markdown-html-converter
Markdown to HTML Converter
Convert Markdown to HTML in your browser with a live preview. GitHub Flavored Markdown via marked, DOMPurify-sanitized output — nothing is uploaded.
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./html-to-markdown
HTML to Markdown Converter
Convert HTML to Markdown entirely in your browser. GitHub Flavored Markdown output via turndown, DOMPurify-sanitized preview — nothing is uploaded.
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./color-converter
Color Converter
Convert any colour between HEX, RGB(A), HSL(A), HSV, HWB, CMYK, and OKLCH, plus check WCAG AA/AAA contrast for normal and large text. Runs entirely in your browser.
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./contrast-checker
Contrast Checker
Check if your foreground and background colors pass WCAG AA and AAA contrast ratios for normal and large text. Fully client-side, no uploads.
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./number-base-converter
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and any base from 2 to 36. Live four-pane sync, BigInt support for huge values, browser-only.
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Text

./case-converter
Case Converter
Convert text between camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, Title Case, lower case, UPPER CASE, Sentence case, dot.case, and path/case — entirely in your browser.
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./word-counter
Word Counter
Count words, characters, sentences, paragraphs, reading time, and speaking time in your browser. Unicode-aware, nothing uploaded, every script.
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./lorem-ipsum
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text in six flavors (Classic, Bacon, Hipster, Corporate, Cat, Pirate). Words, sentences, paragraphs, or list items.
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./diff-checker
Diff Checker
Compare two texts in your browser. Side-by-side, unified, and inline diff views with line, word, and character granularity. Nothing leaves the page.
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Hash & Token

./jwt-decoder
JWT Decoder
Decode and verify JSON Web Tokens entirely in your browser. HS256/384/512 signature checks, no upload, your token never leaves the tab.
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./hash-generator
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 digests from text or files entirely in your browser. Nothing uploaded, hex or Base64 output.
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./bcrypt-generator
Bcrypt Generator
Hash passwords with bcrypt at configurable cost (4-15 rounds) and verify existing hashes. All processing stays in your browser — nothing goes to a server.
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Generate

./qr-generator
QR Code Generator
Generate watermark-free QR codes from text or URLs entirely in your browser. PNG and SVG export, nothing uploaded, no account.
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./qr-reader
QR Code Reader
Decode QR codes from images or your camera entirely in your browser. Drop an image, paste from clipboard, or scan live — nothing is uploaded or stored.
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./uuid-generator
UUID Generator
Generate RFC 4122 v4 / v1 and RFC 9562 v7 UUIDs in bulk, entirely in your browser. Configurable hyphens, case, braces, and base64. Nothing is uploaded.
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./password-generator
Password Generator
Generate strong random passwords and xkcd-style passphrases entirely in your browser. Uses the OS CSPRNG via crypto.getRandomValues — your password never leaves the tab.
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Time

./unix-timestamp
Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back again, in seconds or milliseconds, across multiple timezones. Runs entirely in your browser.
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./cron-expression
Cron Expression Parser
Decode cron expressions, preview the next 10 fire times in any timezone, and build new schedules field by field. Runs entirely in your browser.
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Regex

./regex-tester
Regex Tester
Test JavaScript regular expressions in your browser. Live match highlighting, capture and named groups, replace mode with $1/$ substitution, and a catastrophic-backtracking guard. No upload, no signup, no tracking.
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Image

./exif-stripper
EXIF Stripper
View every embedded EXIF tag in a JPEG, including GPS coordinates, then strip the metadata and download a clean copy. The photo never leaves your device.
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./image-format-converter
Image Format Converter
Convert PNG, JPEG, and WebP images in your browser. Nothing uploads, the Canvas API handles every conversion on your device. Batch download as ZIP.
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./image-compressor
Image Compressor
Compress JPEG, PNG, and WebP images in your browser. Pick a quality level or a target file size, then download. Nothing uploads, ever.
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./image-resizer
Image Resizer
Resize images in your browser by pixels, percentage, or longest side. Lock the aspect ratio, pick a common preset, batch download as ZIP. Nothing uploads.
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./image-to-base64
Image to Base64
Convert any image to a Base64 data URI in your browser. Copy the data:image URI, raw Base64, an tag, or a CSS background snippet. Nothing uploads.
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./heic-to-jpg
HEIC to JPG Converter
Convert HEIC and HEIF photos to JPG or PNG right in your browser. iPhone images decode on your device, never upload, and batch-download as a ZIP.
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./image-crop
Image Cropper
Crop any image right in your browser. Drag the selection rectangle to choose your crop area, pick an aspect ratio, and download the result in the original format. Nothing uploads.
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./favicon-generator
Favicon Generator
Generate a full favicon set from an image or text/emoji — 16, 32, 48, 180, 192, and 512 px. Copy the ready-to-paste HTML and download all files as a ZIP.
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PDF

./image-to-pdf
Image to PDF
Turn JPG and PNG images into one PDF, right in your browser. Reorder pages, pick A4 or Letter, set margins. Nothing is uploaded.
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./pdf-to-jpg
PDF to Image
Turn every page of a PDF into a JPG or PNG, right in your browser. Pick the resolution, download one page or all of them as a ZIP. Nothing is uploaded.
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./merge-pdf
PDF Merge
Merge several PDFs into one file, right in your browser. Drag to set the order, then download. Nothing is uploaded to a server.
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./split-pdf
PDF Split
Split a PDF or pull out a page range, right in your browser. Get one PDF or a ZIP of many. Nothing is uploaded — your file stays on your device.
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./compress-pdf
PDF Compress
Shrink a PDF right in your browser — no upload. Best for scanned, image-heavy files; if it can't make yours smaller it tells you and keeps the original.
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About these tools

Every tool here is a single static page that does all of its work locally in your browser. Nothing you paste, type, or upload leaves your device. Each tool ships in 35 languages and follows the same simple keyboard-friendly interface. New tools are added regularly — bookmark this page to come back.