--- title: "Free Tools for Founders & Builders ยท Laurens De Leeuw" canonical: "https://laurensdeleeuw.be/en/tools" markdown_alternate: "https://laurensdeleeuw.be/en/tools.md" language: "en-BE" content_type: "tool-index" robots: "noindex, follow" --- # Small things, built when needed. 82 free utilities for documents, images, text, and business decisions. Browser tools stay local; file tools process only your request in temporary memory, with no account, email, or payment. ## Original tools ### [Solution Blueprint](https://laurensdeleeuw.be/en/tools/solution-blueprint) Tell me what you're building. Get an honest blueprint: capabilities, complexity, timeline and monthly cost. ### [Build vs. Buy](https://laurensdeleeuw.be/en/tools/build-vs-buy) Should you pay for a SaaS subscription or build your own? See the 3-year numbers and the break-even point. ### [Project Quote](https://laurensdeleeuw.be/en/tools/project-quote) A realistic ballpark for your custom website, web app or internal tool. No email required. ### [Token Generator](https://laurensdeleeuw.be/en/tools/token-generator) Cryptographically secure random tokens. Set length, character sets, prefixes, and more. ### [Compound Interest Calculator](https://laurensdeleeuw.be/en/tools/compound-interest-calculator) See how your money grows. Multiple currencies, monthly or yearly contributions, one-off deposits and a clean comparison table. ### [L$ Hour Calculator](https://laurensdeleeuw.be/en/linden-to-bank-calculator) Convert worked hours to Linden Dollars. Includes every PayPal, Process Credit and LindeX fee. ## Complete tool catalog - [PDF Signer](https://laurensdeleeuw.be/en/tools/pdf-signer): Sign any PDF online by typing or drawing your signature. - [Contract Initials PDF](https://laurensdeleeuw.be/en/tools/contract-initials-pdf): Initial every page of a contract in one click, plus a signature on the last page. - [PDF Compressor](https://laurensdeleeuw.be/en/tools/pdf-compressor): Structurally optimise a PDF while keeping its text searchable. - [Image Resizer](https://laurensdeleeuw.be/en/tools/image-resizer): Resize, crop, rotate, and compress JPG, PNG, WebP, or GIF inputs; export JPEG, PNG, WebP, or AVIF. - [JPG Compressor](https://laurensdeleeuw.be/en/tools/jpg-compressor): Shrink JPG file size for email and websites, with a live quality preview. - [PNG Compressor](https://laurensdeleeuw.be/en/tools/png-compressor): Shrink PNG files while keeping transparency and sharp edges. - [WebP Converter](https://laurensdeleeuw.be/en/tools/webp-converter): Convert JPG, PNG, or any image to WebP for faster websites. - [Profile Picture Cropper](https://laurensdeleeuw.be/en/tools/profile-picture-cropper): Crop a perfectly square profile picture for LinkedIn, Gmail, WhatsApp and more. - [Social Media Image Resizer](https://laurensdeleeuw.be/en/tools/social-media-image-resizer): Resize any photo to Instagram, Facebook, LinkedIn, X, YouTube, and more. - [App Store Screenshot Resizer](https://laurensdeleeuw.be/en/tools/app-store-screenshot-resizer): Resize app screenshots to exact App Store and Google Play sizes. - [QR Code Generator](https://laurensdeleeuw.be/en/tools/qr-generator): Make custom QR codes for URLs, wifi, or contact cards in any color. - [Favicon Generator](https://laurensdeleeuw.be/en/tools/favicon-generator): Turn one image into a full favicon set, ICO plus PNG plus manifest, ready to drop in. - [Open Graph Image Generator](https://laurensdeleeuw.be/en/tools/og-image-generator): Make a 1200 by 630 social card for any post, no design tool required. - [Markdown to PDF](https://laurensdeleeuw.be/en/tools/markdown-to-pdf): Paste markdown, get a clean A4 PDF with headings, lists, code, and links. - [Text Diff Checker](https://laurensdeleeuw.be/en/tools/text-diff-checker): Paste two texts, get a coloured PDF diff with line numbers and a summary. - [Wi-Fi QR Code Generator](https://laurensdeleeuw.be/en/tools/wifi-qr-generator): Print a Wi-Fi QR code your guests can scan to connect, no password typing. - [vCard QR Code Generator](https://laurensdeleeuw.be/en/tools/vcard-qr-generator): Turn your contact details into a QR code people scan to save you instantly. - [Barcode Generator](https://laurensdeleeuw.be/en/tools/barcode-generator): Generate EAN, UPC, Code 128, or Code 39 barcodes and download a print-ready PNG. - [Email Signature Generator](https://laurensdeleeuw.be/en/tools/email-signature-generator): Build a clean HTML email signature with your logo, brand colour, and contact info. - [Scan Cleanup](https://laurensdeleeuw.be/en/tools/scan-cleanup): Turn a phone photo of a document into a clean, readable scan. - [Meeting Minutes Formatter](https://laurensdeleeuw.be/en/tools/meeting-minutes): Turn rough meeting notes into a clean A4 PDF with agenda, decisions, and action items. - [CV / Resume Generator](https://laurensdeleeuw.be/en/tools/cv-generator): Build a clean single-column A4 CV PDF that parses well in any ATS. - [Product Photo Background](https://laurensdeleeuw.be/en/tools/product-photo-prep): Drop your product onto a clean white square sized for Amazon, Etsy, and Shopify. - [Background Remover](https://laurensdeleeuw.be/en/tools/bg-remover): Remove a flat-colour background and export a transparent PNG. - [PDF Merger](https://laurensdeleeuw.be/en/tools/pdf-merger): Combine multiple PDFs into one in the order you choose, no quality loss. - [Image to PDF](https://laurensdeleeuw.be/en/tools/image-to-pdf): Turn your photos or scans into a single PDF, one image per page. - [Receipt Pack](https://laurensdeleeuw.be/en/tools/receipt-pack): Turn a folder of receipt photos into a tidy expense report PDF. - [Invoice Pack](https://laurensdeleeuw.be/en/tools/invoice-pack): Send an invoice with timesheets, receipts, and contracts attached, in one PDF. - [Image Rotate and Flip](https://laurensdeleeuw.be/en/tools/image-rotate-flip): Rotate or mirror any image in seconds. JPG, PNG, WebP. - [Image Crop](https://laurensdeleeuw.be/en/tools/image-crop): Crop any image to a precise rectangle or aspect ratio. - [Invoice Generator](https://laurensdeleeuw.be/en/tools/invoice-generator): Create professional invoice PDFs in EUR, USD, or GBP with per line VAT. - [Payment Request](https://laurensdeleeuw.be/en/tools/payment-request): Send a clean one-page PDF asking a client, member, or friend to pay a specific amount by a specific date. - [Simple Contract](https://laurensdeleeuw.be/en/tools/simple-contract): Generate a plain-English services agreement PDF between two parties in minutes. - [PDF Organizer](https://laurensdeleeuw.be/en/tools/pdf-organizer): Remove, rotate, and reorder pages in a PDF without installing anything. - [PDF Page Numberer](https://laurensdeleeuw.be/en/tools/pdf-page-numberer): Add page numbers to any PDF in any corner, in your chosen format and colour. - [PDF Watermark](https://laurensdeleeuw.be/en/tools/pdf-watermark): Add a custom text watermark to every page of a PDF, in any position, colour, and opacity. - [PDF Stamper](https://laurensdeleeuw.be/en/tools/pdf-stamper): Stamp PAID, APPROVED, VOID, or any custom mark diagonally across a PDF. - [PDF Cropper](https://laurensdeleeuw.be/en/tools/pdf-cropper): Crop the visible area of a PDF, trim white margins, or zoom in on the part you need. - [PDF Page Remover](https://laurensdeleeuw.be/en/tools/pdf-page-remover): Click the pages you want gone and download a clean PDF without them. - [PDF Splitter](https://laurensdeleeuw.be/en/tools/pdf-splitter): Extract a chosen page range from a PDF and download just those pages. - [PDF Page Rotator](https://laurensdeleeuw.be/en/tools/pdf-page-rotator): Rotate any page of a PDF 90, 180, or 270 degrees and download the fixed file. - [PDF Page Reorder](https://laurensdeleeuw.be/en/tools/pdf-reorder-pages): Drag pages into a new order and download a reordered PDF. - [Quote Generator](https://laurensdeleeuw.be/en/tools/quote-generator): Create professional quote PDFs with per line VAT and a valid-until date. - [Receipt Generator](https://laurensdeleeuw.be/en/tools/receipt-generator): Create a clean payment receipt PDF with a clear PAID stamp. - [Credit Note Generator](https://laurensdeleeuw.be/en/tools/credit-note-generator): Issue a credit note PDF to refund or correct an invoice in seconds. - [Text Cleaner](https://laurensdeleeuw.be/en/tools/text-cleaner): Trim, dedupe, sort, case-convert, and find-replace any text in seconds. - [Remove Duplicate Lines](https://laurensdeleeuw.be/en/tools/remove-duplicate-lines): Paste a list and get a clean copy with every duplicate line removed. - [Sort Lines Alphabetically](https://laurensdeleeuw.be/en/tools/sort-lines-alphabetically): Paste a list and download the same lines sorted A to Z or Z to A. - [Text Case Converter](https://laurensdeleeuw.be/en/tools/text-case-converter): Convert any text to UPPERCASE, lowercase, Title Case, or Sentence case. - [Find and Replace Text](https://laurensdeleeuw.be/en/tools/find-and-replace-text): Find every match in a block of text and replace it, with optional regex. - [Letter Generator](https://laurensdeleeuw.be/en/tools/letter-generator): Create a clean business letter PDF with your branding in under a minute. - [Cover Letter Generator](https://laurensdeleeuw.be/en/tools/cover-letter-generator): Create a polished one-page cover letter PDF for a job application. - [Complaint Letter Generator](https://laurensdeleeuw.be/en/tools/complaint-letter-generator): Send a clear, formal complaint letter PDF that creates a paper trail. - [Resignation Letter Generator](https://laurensdeleeuw.be/en/tools/resignation-letter-generator): Send a clean, professional resignation letter PDF that protects the relationship. - [Thank You Letter Generator](https://laurensdeleeuw.be/en/tools/thank-you-letter-generator): Send a warm, professional thank-you letter PDF in a couple of minutes. - [Move-Out Notice Letter Generator](https://laurensdeleeuw.be/en/tools/move-out-notice-letter-generator): Give your landlord a clean, dated move-out notice PDF that protects your tenancy and deposit. - [Rent Increase Reply Letter Generator](https://laurensdeleeuw.be/en/tools/rent-increase-reply-letter-generator): Respond to a rent increase in writing with a polite, professional counter-proposal PDF. - [Repair Request Letter Generator](https://laurensdeleeuw.be/en/tools/repair-request-letter-generator): Send your landlord a clear, dated repair request PDF that creates a written record. - [Deposit Return Letter Generator](https://laurensdeleeuw.be/en/tools/deposit-return-letter-generator): Ask for your tenancy deposit back in writing with a clear, dated request PDF. - [CSV to JSON Converter](https://laurensdeleeuw.be/en/tools/csv-to-json): Paste a CSV and download a clean JSON file, with headers preserved. - [JSON to CSV Converter](https://laurensdeleeuw.be/en/tools/json-to-csv): Paste a JSON array and download a clean CSV file ready for spreadsheets. - [CSV Cleaner](https://laurensdeleeuw.be/en/tools/csv-cleaner): Dedupe rows, drop empty lines, trim cells, and switch delimiters in one pass. - [Remove Duplicate CSV Rows](https://laurensdeleeuw.be/en/tools/remove-duplicate-csv-rows): Paste a CSV and get a clean copy with every duplicate row removed. - [Remove Empty CSV Rows](https://laurensdeleeuw.be/en/tools/remove-empty-csv-rows): Drop every blank row from a CSV in one click and keep your header intact. - [CSV Delimiter Converter](https://laurensdeleeuw.be/en/tools/csv-delimiter-converter): Convert a CSV between comma, semicolon, tab, and pipe delimited formats. - [TSV to CSV Converter](https://laurensdeleeuw.be/en/tools/tsv-to-csv): Paste a tab-separated file and download a clean comma-separated CSV. - [CSV to TSV Converter](https://laurensdeleeuw.be/en/tools/csv-to-tsv): Paste a CSV and download a clean tab-separated TSV file. - [Image Compressor](https://laurensdeleeuw.be/en/tools/image-compressor): Shrink JPG, PNG, and WebP files without losing visible quality. - [Image Cropper](https://laurensdeleeuw.be/en/tools/image-cropper): Crop a photo to any aspect ratio with a clean drag-to-crop tool. - [Image Blur](https://laurensdeleeuw.be/en/tools/image-blur): Blur or pixelate faces, licence plates, and private info in any photo, without installing anything. - [Image Rotator](https://laurensdeleeuw.be/en/tools/image-rotator): Rotate a photo by 90, 180, or 270 degrees, or flip horizontally or vertically. - [JPG to PNG Converter](https://laurensdeleeuw.be/en/tools/jpg-to-png): Convert a JPG photo to a lossless PNG with transparent-friendly output. - [PNG to JPG Converter](https://laurensdeleeuw.be/en/tools/png-to-jpg): Convert a PNG to a smaller JPG, with a white background where there was transparency. - [WebP to JPG Converter](https://laurensdeleeuw.be/en/tools/webp-to-jpg): Convert a WebP image to a widely supported JPG file. - [URL QR Code Generator](https://laurensdeleeuw.be/en/tools/url-qr-code-generator): Turn any link into a clean, print-ready QR code. - [Text QR Code Generator](https://laurensdeleeuw.be/en/tools/text-qr-code-generator): Encode any plain-text message into a scannable QR. More as the work demands them.