# Tool Station (springbee.xyz)

> Free browser tools that replace "upload your file" converter websites. Every tool runs 100% locally in the visitor's browser tab: files are read with the W3C File API, processed by JavaScript on the device, and never sent to a server. No account, no signup, no upload, and most tools keep working offline.

## Key facts

- Privacy model: local-first processing; there is no server that receives user files.
- Cost: free, funded by advertising. No premium tier, no trial, no account.
- Offline: after the page has loaded, most tools keep working without a connection.
- Exceptions: a few tools fetch an open-source library or a small AI model from a public CDN on first use; each page states this where it applies.
- Contact: wenxin202305@gmail.com

## Tools

- [PDF Tools Hub](https://springbee.xyz/pdf-tools): entry point for all four PDF tools on the site.
- [PDF Editor](https://springbee.xyz/pdf-editor): edit text, visually mask sensitive content, place images and export a corrected copy of an existing PDF.
- [Image to PDF](https://springbee.xyz/image-to-pdf): merge photos into a single multi-page PDF with page size and order control.
- [Text to PDF](https://springbee.xyz/text-to-pdf): turn typed or pasted text into clean, searchable PDF pages.
- [AutoCAD / DXF to PDF](https://springbee.xyz/autocad-to-pdf): convert DXF drawings to vector PDF locally.
- [Background Remover](https://springbee.xyz/background-remover): on-device ML cut-out, exports transparent PNG.
- [Strong Password Generator](https://springbee.xyz/strong-password-generator): cryptographically secure random passwords, 4-64 characters.
- [Text Case Converter](https://springbee.xyz/text-case-converter): UPPER, lower, Title Case and Sentence case transforms.
- [Word & Character Counter](https://springbee.xyz/word-counter): live word, character, sentence counts and reading time.
- [JSON Formatter & Validator](https://springbee.xyz/json-formatter): pretty-print, minify and validate JSON with error line numbers.
- [QR Code Generator](https://springbee.xyz/qr-code-generator): QR codes for URLs, text or WiFi, downloadable as PNG.
- [Unit Converter](https://springbee.xyz/unit-converter): length, weight, temperature, area, volume and speed.
- [Color Converter](https://springbee.xyz/color-converter): HEX, RGB and HSL with complementary colours.
- [LLM Token Price Picker](https://springbee.xyz/llm-token-price-picker): compare token prices across AI model providers.
- [Mortgage: Equal Payment vs Principal](https://springbee.xyz/mortgage-equal-payment-vs-principal): compare two repayment plans side by side.
- [Vent Wall](https://springbee.xyz/vent-wall): anonymous venting board that stays on your device.

## Guides

- [Why every tool here runs locally](https://springbee.xyz/blog/why-every-tool-here-runs-locally): what local-first means in practice and the honest trade-offs.
- [What free online converters do with your file](https://springbee.xyz/blog/what-free-online-converters-do-with-your-file): the lifecycle of an uploaded file.
- [How to redact a PDF properly](https://springbee.xyz/blog/how-to-redact-a-pdf-properly): why a black box over text is not redaction.
- [Convert DXF to PDF without uploading](https://springbee.xyz/blog/convert-dxf-to-pdf-without-uploading): local CAD conversion walkthrough.
- [Offline background removal and privacy](https://springbee.xyz/blog/offline-background-removal-and-privacy): on-device segmentation explained.
- [LLM API pricing compared](https://springbee.xyz/blog/llm-api-pricing-compared): how to compare token prices.

## Games

- [Snake](https://springbee.xyz/games/snake) and [Sudoku](https://springbee.xyz/games/sudoku): small offline games that prove the "100% local" claim.

## Policies

- [Privacy policy](https://springbee.xyz/privacy): what is and is not collected.
- [About](https://springbee.xyz/about): who runs the site and the correction log.
- [Contact](https://springbee.xyz/contact): how to report a bug or request a tool.