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Developer tools

Format, minify and inspect HTML, CSS, JavaScript and JSON.

15 tools

  • PopularNew

    llms.txt Generator

    Write and validate an llms.txt file that points AI tools to your site's most useful pages.

    AIIn your browser
  • New

    JSON-LD Generator

    Build schema.org structured data for articles, products, FAQs, events and more, with built-in checks.

    AIIn your browser
  • New

    LLM Token Counter

    Count tokens and estimate cost for GPT, Claude, Gemini and Llama prompts, with exact counts where tokenizers are public.

    AIIn your browser
  • New

    MCP Config Generator

    Generate MCP server config for Claude, Cursor, VS Code, Windsurf and Zed from one form.

    AIIn your browser
  • New

    JSON Schema Generator

    Generate a JSON Schema from example JSON, then validate data against it.

    DeveloperIn your browser
  • Popular

    Meta Tags Generator

    Preview and generate Open Graph, Twitter and SEO meta tags for how your site appears when shared.

    UtilitiesIn your browser

  • JSON Beautifier

    Format JSON with clean indentation and line breaks so it's easy to read.

    DeveloperIn your browser

  • JSON Minifier

    Strip whitespace, indentation and line breaks from JSON to reduce its size.

    DeveloperIn your browser

  • JSON Tree Viewer

    Explore JSON as a collapsible tree to navigate large and nested data.

    DeveloperIn your browser

  • JSON to XML

    Convert JSON data into well-formed XML.

    DeveloperIn your browser

  • HTML Beautifier

    Re-indent and space out HTML markup to make it readable again.

    DeveloperIn your browser

  • CSS Beautifier

    Reformat CSS with consistent indentation and spacing.

    DeveloperIn your browser

  • CSS Minifier

    Remove spaces, line breaks and comments from CSS to cut file size.

    DeveloperIn your browser

  • JS Beautifier

    Reformat JavaScript with proper indentation to improve readability.

    DeveloperIn your browser

  • HEX to RGB Converter

    Translate hexadecimal colour codes into RGB values and back.

    DesignIn your browser

Keep exploring

Other categories

  • Images tools

    Compress, convert, crop and find images for the web.

    11 tools

  • Documents tools

    Merge, split, organise and convert PDFs right in your browser.

    10 tools

  • AI tools

    Get sites, data and prompts ready for AI: llms.txt, crawler access, tokens, schemas and MCP.

    8 tools

  • Converters tools

    Convert between image, document, data and colour formats in a click.

    7 tools

  • Utilities tools

    QR codes, website screenshots, SEO tags and other handy helpers.

    6 tools

  • Design tools

    Colour conversion, favicons and visual assets for your brand.

    3 tools

  • Video tools

    Compress and prepare video files without uploading them.

    1 tool

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Image CompressorPopularCompress PNG, JPG and SVG files in lossless or lossy mode so your pages load faster.ImagesMeta Tags GeneratorPopularPreview and generate Open Graph, Twitter and SEO meta tags for how your site appears when shared.UtilitiesQR Code GeneratorNewTurn links and text into a QR code you can download and print.UtilitiesImage ConverterNewConvert images between common formats in a few clicks.ImagesImage CropperNewCrop images to an exact size or aspect ratio.ImagesImage SearchNewSearch for free images to use in your projects.ImagesHEIC to JPGNewConvert iPhone HEIC photos to JPG, PNG or WebP in bulk, with location data removed.ImagesResize ImageNewResize images to exact pixels, a percentage or a longest side, in bulk, with sharp results.ImagesCompress Image to KBNewShrink images under an exact size like 20 KB, 50 KB or 200 KB for forms and uploads.ImagesRemove Photo MetadataNewSee and strip hidden EXIF, GPS location and camera data from photos without re-compressing them.ImagesMerge PDFNewCombine PDFs into one file, reorder them and pick exactly which pages to keep from each.DocumentsSplit PDFNewSplit a PDF into single pages, page ranges or equal parts, or extract the pages you select.DocumentsOrganize PDFNewReorder, rotate and delete PDF pages visually, then save a clean new file.DocumentsJPG to PDFNewTurn JPG, PNG and WebP images into one PDF with page size, orientation and margins.DocumentsPDF to JPGNewConvert PDF pages to high-resolution JPG or PNG images, all pages or just the ones you pick.DocumentsCompress VideoNewShrink videos to a target size for WhatsApp, Discord or email, and see the result size before you start.VideoCompress PDFNewShrink PDFs by recompressing the images inside them, while text and vector graphics stay sharp.DocumentsPDF to WordNewTurn a PDF's text into an editable Word document, with headings, paragraphs and page breaks.DocumentsSign PDFNewDraw, type or upload your signature and place it anywhere on a PDF, plus dates and initials.DocumentsOCR PDFNewMake scanned PDFs searchable and copyable by recognising the text on every page.DocumentsProtect PDFNewAdd a password with AES-256 encryption and control printing and copying, or remove a password you know.Documentsllms.txt GeneratorPopularNewWrite and validate an llms.txt file that points AI tools to your site's most useful pages.AIAI Crawler CheckerNewSee which AI crawlers (GPTBot, ClaudeBot, PerplexityBot and more) your robots.txt allows or blocks.AIJSON-LD GeneratorNewBuild schema.org structured data for articles, products, FAQs, events and more, with built-in checks.AILLM Token CounterNewCount tokens and estimate cost for GPT, Claude, Gemini and Llama prompts, with exact counts where tokenizers are public.AIMCP Config GeneratorNewGenerate MCP server config for Claude, Cursor, VS Code, Windsurf and Zed from one form.AIJSON Schema GeneratorNewGenerate a JSON Schema from example JSON, then validate data against it.DeveloperAI Prompt BuilderNewStructure prompts with a role, task, context, constraints, output format and examples, with reusable variables.AIAI Readiness CheckerNewScore how well a page can be read, understood and cited by AI search and assistants.AI
Categories
Developer toolsFormat, minify and inspect HTML, CSS, JavaScript and JSON.15 toolsImage toolsCompress, convert, crop and find images for the web.11 toolsPDF toolsMerge, split, organise and convert PDFs right in your browser.10 toolsAI toolsGet sites, data and prompts ready for AI: llms.txt, crawler access, tokens, schemas and MCP.8 toolsCalculators & convertersConvert between image, document, data and colour formats in a click.7 toolsUtility toolsQR codes, website screenshots, SEO tags and other handy helpers.6 toolsDesign & color toolsColour conversion, favicons and visual assets for your brand.3 toolsText & writing toolsCount, check and shape your words and copy.3 toolsVideo toolsCompress and prepare video files without uploading them.1 tools