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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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120 live tools today — no sign-up, no caps.
120 tools
- 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.
- 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.
- Claude Resume TimerGenerators
Set a timer and get the exact terminal command to keep Claude Code running while you step away.
- OpenAI Token CounterCalculators
Paste text to count tokens and calculate API costs for any OpenAI model instantly.
- QR Code GeneratorGenerators
Generate QR codes from any text or URL with customizable size and error correction level.
- JWT DecoderConverters
Paste a JWT token to decode its header, payload, and claims instantly.
- 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.
- 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.
- Cron Expression GeneratorGenerators
Build or paste a cron expression to see what it means in plain English and exactly when it will run next.
- JSON Schema ValidatorConverters
Paste your JSON schema to validate it for OpenAI function calling — catch errors before your API call fails.
- YAML to JSON ConverterConverters
Paste YAML below to convert it to JSON, with every value the conversion silently changed listed underneath it.
- 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.
- Password GeneratorGenerators
Generate cryptographically secure random passwords with configurable length and character types.
- MCP Config GeneratorGenerators
Generate valid MCP server configuration for Claude Desktop, Cursor, VS Code, Windsurf, and Zed.
- MCP Security ScannerCalculators
Scan MCP server configurations for security issues including missing auth, CORS, and HTTPS.
- CSS Border Radius GeneratorGenerators
Round the corners of any element — set a uniform radius or tune each corner, preview it, and copy the CSS.
- MCP Schema ValidatorConverters
Paste your MCP tool definitions to validate them against the official spec.
- Base64 Encoder & DecoderConverters
Encode text to Base64 or decode Base64 strings back to text instantly.
- MCP Server TesterConverters
Test MCP tool definitions with simulated calls and see what LLMs receive.
- Curl Command GeneratorConverters
Build cURL commands for REST APIs with headers, authentication, and request bodies.
- 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.
- URL Encoder & DecoderConverters
Encode any string to RFC 3986 percent-encoded format or decode percent-encoded URLs back to readable text.
- Timestamp ConverterConverters
Convert between Unix timestamps and human-readable dates with timezone-aware display.
- Hash GeneratorConverters
Generate cryptographic hashes from any text using SHA-1, SHA-256, SHA-384, or SHA-512.
- Regex TesterConverters
Paste a regex pattern and test string to see every match, capture group, and match position in real time.
- 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.
- 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.
- 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 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.
- 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 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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 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.
- 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.
- 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.
- Grayscale Image ConverterImage Tools
Drop images, choose a grayscale method or a black-and-white threshold, and download the converted copies — processed on your device, never 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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 DPI ChangerImage Tools
Drop a PNG or JPG, set the DPI you need, and download a copy whose pixel data is byte-for-byte identical — the change is metadata only, and nothing is uploaded.
- 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.
- 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.
- 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.
- 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.
- 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.
- Add Text to ImageImage Tools
Drop a photo or screenshot, type a caption, label, title or watermark, choose a font, colour and outline, then drag the text anywhere on the picture and download it — all on your device.
- Image Background ColorImage Tools
Drop transparent images, choose a colour or a preset swatch, and download the flattened copies — every pixel opaque, processed on your device, never uploaded.
- Passport Photo MakerImage Tools
Drop one photo, pick a passport or ID size, pan and zoom it inside a frame that matches that size, then download the single photo plus a 4×6 inch sheet of copies to print and cut.
- Add Page Numbers to PDFPDF Tools
Drop one PDF, choose where the number sits and how it reads, then download a copy with a page number drawn on each chosen page — all on your own device.
- Social Media Image ResizerImage Tools
Drop images, pick a platform size, and choose Fit (the whole picture, padded) or Fill (the frame covered, cropped) — then download the resized copies. Processed on your device, never uploaded.
- Resize PDF PagesPDF Tools
Drop a PDF, choose A4, Letter or a custom size, and decide whether to scale the content to fit or keep its size — all on your own device.
- Sharpen ImageImage Tools
Drop images, set the amount and radius of the unsharp mask, and download the crisper copies — computed on your device, never uploaded.
- CSV to PDF Table ConverterPDF Tools
Upload or paste a CSV, pick the page size and orientation, and get a real PDF table with a bold header repeated on every page.
- Remove PDF MetadataPDF Tools
Delete a PDF's document properties, its XMP metadata packet and its file identifiers, then download a clean copy — all on your own device, with nothing uploaded.
- Image to ASCII Art GeneratorImage Tools
Drop an image, choose how many columns and which characters to use, and get ASCII art you can copy or download — rendered on your device, never uploaded.
- Favicon GeneratorImage Tools
Drop one image and get the whole favicon set — six PNGs, a multi-size favicon.ico and the HTML to paste — made on your device, never uploaded.
- Edit PDF MetadataPDF Tools
Open a PDF, see its Title, Author, Subject, Keywords, Creator, Producer and dates, change any of them or clear the lot, then save a new copy — on your own device.
- Pixelate ImageImage Tools
Drop your images, set a block size, and download the mosaic — block averaging runs on your device, so nothing is uploaded.
- PNG to WebP ConverterImage Tools
Drop PNG images, choose a WebP quality, and download smaller WebP files — transparency kept, converted on your device, nothing uploaded.
- Remove PDF PagesPDF Tools
Choose a PDF, type the pages you want to delete — like 2, 5-6 — and download the same PDF without them. Nothing leaves your device.
- SVG to JPG ConverterImage Tools
Drop SVG files, choose a scale or an exact width, a JPG quality and a background colour, and download JPG images rendered on your own device.
- GIF to JPG ConverterImage Tools
Drop a GIF and download its first frame as a JPG, flattened onto a background colour and encoded at the quality you choose — done on your device, never uploaded.
- Add Watermark to PDFPDF Tools
Drop one PDF, type the watermark and pick its look, then download a copy with the mark drawn on the pages you choose — all on your own device, with the file never leaving it.
- Add Image to PDFPDF Tools
Drop a PDF and a PNG or JPG, choose where the picture sits and how big it is, then download the same PDF with the image drawn on the pages you pick — all on your own device.
- Invert Image ColorsImage Tools
Drop images, choose whether to keep transparency, and download the inverted copies — processed on your device, never uploaded.
- Text to PDFPDF Tools
Paste or type your text, choose the page size, font size and margins, then download a paginated PDF — laid out in your browser and never uploaded.
- Markdown to PDF ConverterPDF Tools
Paste Markdown, choose the page size, font size and margins, and download a paginated PDF with the text laid out — all in your browser, with nothing uploaded.
- Mirror & Flip ImageImage Tools
Drop one or more images, choose Horizontal, Vertical or Both, then download the mirrored copies — every flip happens on your own device and nothing is uploaded.
- Fill PDF FormPDF Tools
Choose a PDF that already has fillable fields, type and tick your answers in place, and download the filled copy — all on your device, with nothing uploaded.
- HEIC to PNG ConverterImage Tools
Drop iPhone HEIC photos and download them as lossless PNG — decoded on your own device, never uploaded, no watermark.
- Upscale ImageImage Tools
Drop images, choose 2×, 3×, 4× or a target long side, and download the enlarged copies — resampled on your device, never uploaded.
- Redact a PDFPDF Tools
Choose a PDF, drag a black box over anything private, and download a copy where the covered content is gone for good — redacted on your own device.
- JPG to BMP ConverterImage Tools
Drop JPG or JPEG images and download them as uncompressed 24-bit BMP files — written by this tool on your own device, never uploaded, no watermark.
- BMP to PNG ConverterImage Tools
Drop BMP bitmap images and download them as small, lossless PNG files — every pixel kept exactly, converted on your device, nothing uploaded.
- Base64 to PDF DecoderPDF Tools
Paste a base64 string or data URL, decode it back into a real PDF, and download the file — validated and decoded entirely in your browser, with nothing uploaded.
- PNG to BMP ConverterImage Tools
Convert PNG images to uncompressed 24-bit BMP files in your browser. Choose the colour that replaces transparency — your files are never uploaded.
- BMP to JPG ConverterImage Tools
Drop BMP bitmap images and download them as small JPG files — set the quality and the background colour, converted on your device, nothing uploaded.
- Crop Image to CircleImage Tools
Crop any image to a centred circle or rounded square and download it as a PNG with a transparent outside — processed on your device, never uploaded.
- JSON to XML ConverterConverters
Paste JSON, pick a root element name, and get valid indented XML — attributes, text and escaping handled, with a copy button, all in your browser.
- Sepia Image FilterImage Tools
Drop an image in, set how strong the sepia tone should be, watch the preview change and download the result — all inside your browser.
- ICO to PNG ConverterImage Tools
Drop a Windows .ico file and get every image inside it back as a separate PNG — each size named and downloaded in your browser, never uploaded.
- JPG to WebP ConverterImage Tools
Drop JPG or JPEG images, choose a WebP quality, and download smaller WebP files — converted on your own device, nothing uploaded.
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.
Built for people who need an answer, not another website to figure out.
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Clean tools that work.