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- JSON FormatterPaste your JSON below to format, validate, and beautify it instantly.
- UUID GeneratorClick below to generate a random, version-4 UUID you can use immediately.
- Percentage CalculatorSoonCalculate percentages and percentage change.
- LLM Token CounterPaste any text to count its tokens for GPT-5.6, Claude, and Gemini models, and see what it costs to send.
- Cron Expression GeneratorBuild or paste a cron expression to see what it means in plain English and exactly when it will run next.
- Context Window CalculatorPaste your prompt, pick a model, and see how much of its context window you use and how many tokens remain for the reply.
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81 tools
- JSON FormatterConverters
Paste your JSON below to format, validate, and beautify it instantly.
- Context Window CalculatorCalculators
Paste your prompt, pick a model, and see how much of its context window you use and how many tokens remain for the reply.
- CSS Glassmorphism GeneratorGenerators
Create frosted-glass UI panels — tune the blur, fill, border, and radius, preview it, and copy the CSS.
- Image to Base64 ConverterConverters
Turn any image into a base64 data URL — encode a file in your browser, without ever uploading it.
- Markdown PreviewGenerators
Paste or type markdown and watch it render — headings, lists, code blocks, blockquotes — then copy the HTML.
- Case ConverterConverters
Paste any identifier or phrase and see it in every case at once — camelCase, snake_case, kebab-case, PascalCase and more — then copy the one you need.
- Base64 to Image ConverterConverters
Paste a base64 string or data URL, preview the image it encodes, and download it as a file — decoded entirely in your browser.
- JSON to YAML ConverterConverters
Paste JSON, get YAML — converted in your browser with clean block formatting and a copy button.
- Text to ASCII ConverterConverters
Turn any text into its ASCII codes — see the decimal (or hexadecimal) value of every character, all locally in your browser.
- Markdown to HTML ConverterConverters
Turn markdown into clean HTML — paste your source, copy the resulting markup, all in your browser.
- JSON to CSV ConverterConverters
Paste an array of JSON objects and get a clean CSV table — rows, columns and correct quoting, all converted in your browser with a copy button.
- UUID GeneratorGenerators
Click below to generate a random, version-4 UUID you can use immediately.
- MCP Server TesterConverters
Test MCP tool definitions with simulated calls and see what LLMs receive.
- CSS Box Shadow GeneratorGenerators
Build a CSS box-shadow visually — pick offset, blur, spread, and color, preview it, and copy the CSS.
- Embedding Dimension CalculatorCalculators
Enter your embedding count and dimensions to see exactly how much storage you need across every precision level.
- Timestamp ConverterConverters
Convert between Unix timestamps and human-readable dates with timezone-aware display.
- Regex TesterConverters
Paste a regex pattern and test string to see every match, capture group, and match position in real time.
- MCP Schema ValidatorConverters
Paste your MCP tool definitions to validate them against the official spec.
- MCP Config GeneratorGenerators
Generate valid MCP server configuration for Claude Desktop, Cursor, VS Code, Windsurf, and Zed.
- Base64 Encoder & DecoderConverters
Encode text to Base64 or decode Base64 strings back to text instantly.
- MCP Security ScannerCalculators
Scan MCP server configurations for security issues including missing auth, CORS, and HTTPS.
- Cron Expression GeneratorGenerators
Build or paste a cron expression to see what it means in plain English and exactly when it will run next.
- YAML to JSON ConverterConverters
Paste YAML below to convert it to JSON, with every value the conversion silently changed listed underneath it.
- JWT DecoderConverters
Paste a JWT token to decode its header, payload, and claims instantly.
- CSS Gradient GeneratorGenerators
Build CSS gradients visually — pick a type, choose colors, adjust the angle, and copy clean CSS.
- Diff CheckerConverters
Paste two texts and see exactly what changed — line by line, with inline highlights.
- Hash GeneratorConverters
Generate cryptographic hashes from any text using SHA-1, SHA-256, SHA-384, or SHA-512.
- QR Code GeneratorGenerators
Generate QR codes from any text or URL with customizable size and error correction level.
- HTML MinifierConverters
Minify HTML code by removing comments, collapsing whitespace, and stripping redundant attributes.
- Color ConverterConverters
Convert a color between HEX, RGB, and HSL, check its WCAG contrast ratio, and preview a working palette.
- CSS Border Radius GeneratorGenerators
Round the corners of any element — set a uniform radius or tune each corner, preview it, and copy the CSS.
- JSON Schema ValidatorConverters
Paste your JSON schema to validate it for OpenAI function calling — catch errors before your API call fails.
- Password GeneratorGenerators
Generate cryptographically secure random passwords with configurable length and character types.
- Claude Resume TimerGenerators
Set a timer and get the exact terminal command to keep Claude Code running while you step away.
- LLM Token CounterCalculators
Paste any text to count its tokens for GPT-5.6, Claude, and Gemini models, and see what it costs to send.
- URL Encoder & DecoderConverters
Encode any string to RFC 3986 percent-encoded format or decode percent-encoded URLs back to readable text.
- Curl Command GeneratorConverters
Build cURL commands for REST APIs with headers, authentication, and request bodies.
- OpenAI Token CounterCalculators
Paste text to count tokens and calculate API costs for any OpenAI model instantly.
- CSV to JSON ConverterConverters
Paste a CSV table and get a clean JSON array of objects — the header becomes the keys, every row becomes an object, with a copy button and no upload.
- WebP to PNG ConverterImage Tools
Drop one or many WebP images and download them as PNG — transparency kept, converted on your own device, nothing uploaded.
- PNG to SVG ConverterImage Tools
Drop a PNG or JPG, pick the image type and colour count, and download a traced SVG — vectorized on your device, nothing uploaded.
- Merge PDFPDF Tools
Add two or more PDFs, put them in the order you want, and download one combined PDF — merged on your own device, never uploaded.
- JPG to PDF ConverterPDF Tools
Add JPG or other images, put them in page order, choose a page size, and download one PDF — built on your own device, nothing uploaded.
- JPG to PNG ConverterImage Tools
Drop JPG or JPEG images and download them as lossless PNG files — converted on your own device, nothing uploaded, no watermark.
- Split PDFPDF Tools
Choose a PDF, type the pages you want, and extract them, delete them, or split the file into separate PDFs — all on your own device.
- PNG to ICO ConverterImage Tools
Drop a PNG, JPG, WebP or SVG, tick the icon sizes you need, and download one favicon.ico containing all of them — made on your device.
- PNG to PDF ConverterPDF Tools
Add PNG screenshots or graphics, set the page order and size, and download one PDF with every pixel kept — built in your browser, nothing uploaded.
- SVG to PNG ConverterImage Tools
Drop SVG files, choose a scale or an exact width and a background, and download sharp PNG or JPG images rendered on your device.
- Image ResizerImage Tools
Drop images, choose a percentage, a width, a height or an exact pixel size, and download the resized copies — all processed on your device.
- WebP to JPG ConverterImage Tools
Drop WebP images, pick a quality and a background colour for transparent areas, and download them as JPG — converted on your device, never uploaded.
- PDF to PNG ConverterPDF Tools
Pick a PDF, choose pages and a resolution up to 300 DPI, and download each page as a lossless PNG — rendered on your own device, never uploaded.
- HEIC to JPG ConverterImage Tools
Drop iPhone HEIC photos, choose JPG or PNG, and download converted images — decoded on your own device, never uploaded, no watermark.
- Image to Text ConverterImage Tools
Drop, pick or paste an image or screenshot, click Extract text, then copy the recognised English text or download it as a .txt file.
- PNG to JPG ConverterImage Tools
Drop PNG images, choose a JPG quality and a colour for transparent areas, and download smaller JPG files — converted on your device, nothing uploaded.
- XML to JSON ConverterConverters
Paste XML and get structured JSON — attributes preserved under @_ keys, values left as strings, with a copy button and no upload.
- XML FormatterConverters
Paste raw or minified XML and get clean indented markup — validated as structurally well-formed, with attributes, text and comments left untouched, all in your browser.
- PDF to JPG ConverterPDF Tools
Pick a PDF, choose the pages and resolution, and download each page as a JPG image — rendered on your own device, never uploaded.
- Compress PDFPDF Tools
Choose a PDF, pick lossless clean-up or strong compression, and see the exact before and after size — compressed on your device, never uploaded.
- Image CompressorImage Tools
Drop JPG, PNG or WebP images, set a quality or a target size in KB, and download smaller files — compressed on your device, never uploaded.
- HEIC to PDF ConverterPDF Tools
Add iPhone HEIC photos, put them in page order, pick a page size, and download one PDF — decoded and built in your browser, nothing uploaded.
- Organize PDFPDF Tools
Choose a PDF, then move, rotate, delete or add blank pages on the thumbnails and save the reorganised PDF — all on your own device.
- PDF to TextPDF Tools
Choose a PDF, click Extract text, then copy the text or download it as a .txt file — read straight from the PDF on your own device.
- JFIF to JPG ConverterImage Tools
Drop .jfif, .jpeg or .jpe files and download them as .jpg — the image data is kept byte for byte, so nothing is recompressed or lost.
- GIF to PNG ConverterImage Tools
Drop a GIF and save its first frame as a PNG, or extract every frame as numbered PNGs — decoded on your device, never uploaded.
- Flatten PDFPDF Tools
Choose a filled-in PDF form and flatten it: every field's current value becomes fixed page content and nothing stays editable — processed on your device.
- Rotate PDFPDF Tools
Choose a PDF, pick all pages or click the ones to turn, choose 90° or 180°, and save the rotated PDF — done on your own device.
- Image SplitterImage Tools
Drop an image, choose columns and rows or a preset, check the grid on the preview, and download every tile in one ZIP — processed on your device.
- Rotate & Flip ImageImage Tools
Drop one or more images, rotate them left or right, flip or mirror them, optionally straighten by a few degrees, and download the results — processed on your device.
- Crop PDFPDF Tools
Choose a PDF, drag the crop box or type the margins to trim, pick the pages, and save the cropped PDF — done on your own device.
- AVIF to JPG ConverterImage Tools
Drop AVIF images, pick a JPG quality and a colour for transparent areas, and download JPEGs — converted on your device, never uploaded.
- Blur & Pixelate ImageImage Tools
Drop an image, draw boxes over faces, names or numbers, choose Blur, Pixelate or Solid box, and download the censored copy — processed on your device.
- Image ConverterImage Tools
Drop any common image — JPG, PNG, WebP, HEIC, AVIF, GIF, BMP, SVG or ICO — choose JPG, PNG, WebP or ICO, and download the converted files.
- Sign PDFPDF Tools
Draw, type or upload your signature, place it on any page of your PDF with the date or your name, and download the signed copy — without uploading the file.
- Collage MakerImage Tools
Add 2 to 9 photos, pick a layout and size, drag each photo into place, and download the collage as JPG or PNG — made on your device, nothing uploaded.
- AVIF to PNG ConverterImage Tools
Drop one or many AVIF images and download them as PNG — transparency kept, decoded by your own browser, nothing uploaded.
- Meme GeneratorImage Tools
Choose your own image, type top and bottom text or add draggable text boxes, then download the meme as PNG or JPG — made on your device, nothing uploaded.
- Crop ImageImage Tools
Drop a photo, drag the crop box or type exact pixel values, choose an aspect ratio or a circle, and download the cropped image — processed on your device.
- Barcode GeneratorImage Tools
Type a number or text, pick EAN-13, UPC-A, EAN-8, Code 128, Code 39 or ITF-14, and download a sharp PNG or SVG barcode — check digit included.
- Image Color PickerImage Tools
Open or paste an image, hover to magnify and click any pixel to get its HEX, RGB, HSL and CMYK codes, or extract the image's dominant colour palette.
- PDF EditorPDF Tools
Open a PDF, add text, images, white-out boxes, highlights, shapes, drawings or a signature on any page, then save the edited PDF — all inside your browser.
- QR Code ScannerImage Tools
Drop, paste or choose an image — or use your camera — to read any QR code in it, see what it contains, and copy the text or link safely.
On the roadmap
Researched and queued — nothing appears above until it is built and reviewed.
- Percentage Calculator
- Base64 Encoder/Decoder
- URL Parser
- Regex Tester
- Color Converter
- Password Generator
- Markdown Editor
- Unit Converter
- Time Zone Converter
- HTML Previewer
- AI Text Humanizer
Why AllUtil?
Every tool earns its page.
Every tool here was researched, built and reviewed one at a time. None of them were generated in bulk to fill a category.
- 01
Researched
We identify real problems people search for.
- 02
Implemented
We build fast, accurate and reliable tools.
- 03
Reviewed
Every tool is tested for accuracy and usability.
- 04
Maintained
We keep tools updated as things change.
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