# Simple Tools

> Free, privacy-first tools that run in your browser. Nothing is uploaded. Browser agents can call a tool after opening its page. Each live client tool registers on document.modelContext (WebMCP). No API key. File tools take { mime, base64 } (max 12 MiB decoded), not OS File objects.

## Image

- [Image Compressor](https://simpletoolstack.com/image/image-compress): Shrink JPEG, PNG and WebP — by quality or to an exact size.
- [Image Converter](https://simpletoolstack.com/image/image-convert): Convert between JPEG, PNG, WebP, AVIF, JXL and HEIC.
- [Crop Image](https://simpletoolstack.com/image/crop-image): Crop a photo, freeform or by ratio — in your browser.
- [Image Resize](https://simpletoolstack.com/image/image-resize): Resize by pixels, percent or preset — in your browser.
- [Circle Crop](https://simpletoolstack.com/image/circle-crop): Crop a photo into a circle (transparent PNG) — in your browser.
- [EXIF Remover](https://simpletoolstack.com/image/exif-remover): See and strip hidden photo metadata — including GPS location.
- [Batch Background Remover](https://simpletoolstack.com/image/background-remover-batch): Remove backgrounds from whole batches at full resolution. (coming soon)
- [Batch Image Compressor](https://simpletoolstack.com/image/image-compress-batch): Compress whole batches of images — built for big jobs. (coming soon)

## PDF

- [Merge PDF](https://simpletoolstack.com/pdf/pdf-merge): Combine PDFs into one — in your browser, nothing uploaded.
- [PDF to JPG](https://simpletoolstack.com/pdf/pdf-to-jpg): Turn PDF pages into images — in your browser, nothing uploaded.
- [Split PDF](https://simpletoolstack.com/pdf/pdf-split): Split a PDF or extract pages — in your browser, nothing uploaded.
- [JPG to PDF](https://simpletoolstack.com/pdf/jpg-to-pdf): Turn images into one PDF — in your browser, nothing uploaded.
- [Organize PDF](https://simpletoolstack.com/pdf/pdf-organize): Delete & reorder PDF pages — in your browser.
- [Rotate PDF](https://simpletoolstack.com/pdf/pdf-rotate): Rotate a PDF and save the rotation — in your browser.

## Text

- [Word & Character Counter](https://simpletoolstack.com/text/word-counter): Words, characters & platform limits — live, in your browser.
- [Text Cleaner](https://simpletoolstack.com/text/text-cleaner): Strip line breaks, extra spaces and duplicate lines in one pass.
- [AI Text Cleaner](https://simpletoolstack.com/text/ai-text-cleaner): Clean AI text: em dashes, smart quotes and hidden characters.
- [Text Diff](https://simpletoolstack.com/text/text-diff): Compare two texts side by side, 100% in your browser.
- [Case Converter](https://simpletoolstack.com/text/case-converter): Switch text to UPPER, lower, Title or camelCase instantly.
- [Find & Replace](https://simpletoolstack.com/text/find-and-replace): Find & replace text — regex and bulk, in your browser.
- [Slug Generator](https://simpletoolstack.com/text/slug-generator): Turn any title into a clean, SEO-ready URL slug.

## Converters

- [Date Duration Calculator](https://simpletoolstack.com/converters/date-duration): Days, weeks and months between two dates — in your browser.
- [Business Days Calculator](https://simpletoolstack.com/converters/business-days): Working days between dates, with per-country holidays.
- [Color Converter](https://simpletoolstack.com/converters/color-converter): Convert colors across hex, rgb, hsl, oklch and lab.
- [Add/Subtract Days](https://simpletoolstack.com/converters/date-add-subtract): Add or subtract days, weeks or months from a date.

## Generators

- [QR Code Generator](https://simpletoolstack.com/generators/qr-code): Text, URL or Wi-Fi → QR code (SVG/PNG), in your browser.
- [Password Generator](https://simpletoolstack.com/generators/password): Strong random passwords with Web Crypto — in your browser.
- [Lorem Ipsum Generator](https://simpletoolstack.com/generators/lorem-ipsum): Generate Lorem Ipsum placeholder text — words, paragraphs or HTML.
- [UUID Generator](https://simpletoolstack.com/generators/uuid): UUID v4 & v7 — single or bulk, in your browser.

## Developer

- [JSON Formatter](https://simpletoolstack.com/dev-data/json-formatter): Format, validate & minify JSON — in your browser.
- [Timestamp Converter](https://simpletoolstack.com/dev-data/timestamp-converter): Unix epoch ↔ date — ISO 8601, UTC and timezone.
- [Base64 Encoder](https://simpletoolstack.com/dev-data/base64-encoder): Encode & decode Base64 — in your browser, nothing uploaded.
- [Hash Generator](https://simpletoolstack.com/dev-data/hash-generator): MD5/SHA-256/512 hashes of text or files — in your browser.

## Developers

- [Developer documentation](https://simpletoolstack.com/developers)
- [OpenAPI specification](https://simpletoolstack.com/openapi.json)
- [Tool catalog JSON](https://simpletoolstack.com/api/v1/tools)
- [WebMCP manifest](https://simpletoolstack.com/.well-known/webmcp.json)

## Legal

- [Privacy](https://simpletoolstack.com/privacy)
- [Terms](https://simpletoolstack.com/terms)