★ 48 free tools · runs entirely in your browser

Tools we built for ourselves.

Small tools for daily problems — fast, free and privacy-friendly. No sign-up, no uploads, no nonsense. We use them every day, so we keep them sharp.

48 tools11 categories100% in-browser$0 forever

Popular tools

The ones we open most often.

Browse all 48 →

Base64 Encoder / DecoderPopular Encode or decode Base64 text and files, with image preview. Color ConverterPopular Convert colors between HEX, RGB, HSL and OKLCH with live preview. Cron BuilderPopular Build cron expressions visually with a human-readable summary. CSV ViewerPopular Upload and explore CSV files with search, sort and paging. cURL to FetchPopular Convert a cURL command into a JavaScript fetch() snippet. Fake Data GeneratorPopular Generate realistic names, emails, addresses and more. Hash GeneratorPopular Compute MD5, SHA-1, SHA-256 and SHA-512 hashes of text or files. Image CompressorPopular Compress and resize JPG, PNG and WebP images in your browser. JWT DecoderPopular Decode JSON Web Tokens and inspect the header, payload and claims. Markdown EditorPopular Write Markdown with a live, GitHub-style preview.

Browse by category

11 focused collections.

API & Web

9 tools

Authentication & Security

All tools

Every tool, grouped by category and listed A–Z. 48 and counting.

API & Web

Encode, decode and convert the everyday formats you reach for while building and testing APIs.

Base64 Encoder / DecoderPopular Encode or decode Base64 text and files, with image preview. cURL Beautifier Format messy cURL commands into a clean, readable layout. cURL to C# Convert a cURL command into C# using HttpClient. cURL to FetchPopular Convert a cURL command into a JavaScript fetch() snippet. cURL to Java Convert a cURL command into Java using the HttpClient API. cURL to Python Convert a cURL command into Python using the requests library. HTML Entity Encoder / Decoder Encode text to HTML entities or decode entities back to text. HTTP Status Codes A searchable reference of every HTTP status code and meaning. URL Encoder / DecoderPopular Percent-encode or decode URLs and query string components.

Authentication & Security

Decode tokens, generate IDs, hashes and strong passwords — all computed locally in your browser.

Hash GeneratorPopular Compute MD5, SHA-1, SHA-256 and SHA-512 hashes of text or files. HMAC Generator Generate HMAC signatures with SHA-1, SHA-256, SHA-384 or SHA-512. JWT DecoderPopular Decode JSON Web Tokens and inspect the header, payload and claims. Password GeneratorPopular Create strong, random passwords with a live strength meter. UUID GeneratorPopular Generate random UUID v4 identifiers, one at a time or in bulk.

Color & Design

Convert colors, check accessibility contrast and copy ready-to-use CSS values — fast, local design helpers.

Color ConverterPopular Convert colors between HEX, RGB, HSL and OKLCH with live preview. Contrast Checker Check color contrast against WCAG AA and AAA accessibility levels.

Converters

Convert images and video between formats and shrink file sizes — all processed locally, nothing uploaded.

Image Converter Convert images between JPG, PNG, WebP and AVIF — single or in bulk — with smart compression. Video Compressor Shrink video file sizes with quality and resolution presets — no upload, fully private. Video Converter Convert videos to MP4, WebM, MKV, MOV, AVI or GIF — entirely in your browser.

Data Files

Inspect and format the structured files you wrangle every day — CSV, XML and YAML.

Database

Clean up, format and compact SQL so it is readable in reviews and tidy in production.

Documentation

Write Markdown, convert between formats and shape clean text for docs and the web.

Case Converter Convert text between camelCase, snake_case, kebab and more. HTML to Markdown Convert HTML into clean, readable Markdown. HTML to PDF Render an HTML snippet and download it as a PDF. Markdown EditorPopular Write Markdown with a live, GitHub-style preview. Markdown to DOCX Convert Markdown into a downloadable Word document. Markdown to HTML Convert Markdown into clean, copy-ready HTML. Markdown to PDF Render Markdown and download it as a polished PDF. Slug Generator Turn any title into a clean, SEO-friendly URL slug. Word Counter Count words, characters, sentences and reading time.

Generators

Generate QR codes, barcodes, placeholder copy and realistic test data on demand.

Barcode Generator Generate barcodes in common formats and download them. Fake Data GeneratorPopular Generate realistic names, emails, addresses and more. Lorem Ipsum Generator Generate placeholder paragraphs, sentences or words. Meta Tag Generator Generate SEO, Open Graph and Twitter Card meta tags. QR Code GeneratorPopular Create QR codes for links, email, phone, Wi-Fi and text. Random Number Generator Generate secure random numbers in any range, single or bulk.

Image Tools

Compress, resize and convert images right in your browser — your files never leave your device.

Image CompressorPopular Compress and resize JPG, PNG and WebP images in your browser.

Featuredby Upwwards

JSON Studio

Working with JSON all day? We built a dedicated suite for it. Viewer, formatter, validator, diff, converters and schema tools — all in one focused workspace.

JSON Viewer ↗ Formatter ↗ Validator ↗ Diff ↗

Open JSON Studio

{
  "name": "Upwwards",
  "tools": 48,
  "free": true,
  "private": true
}

Testing & Debugging

Test regular expressions, diff text and convert number bases while you debug.

Number Base Converter Convert numbers between binary, octal, decimal and hex. Regex TesterPopular Test regular expressions with live match highlighting and groups. Sort & Dedupe Lines Sort, deduplicate, trim and reverse lines of text. Text Diff CheckerPopular Compare two blocks of text and highlight what changed.

Time & Scheduling

Wrangle Unix timestamps, time zones and cron expressions without second-guessing the math.

Frequently asked questions

Are the Upwwards tools really free?

Yes. Every one of the 48 tools is 100% free to use with no sign-up, no account and no usage limits.

Is my data uploaded anywhere?

No. Every tool runs entirely in your browser — your text, files and data never leave your device and are never sent to a server.

Who builds Upwwards Tools?

Upwwards Tools is built and maintained by Upwwards (upwwards.com), the team behind JSON Studio. The whole collection is free to use.

Do these tools work on mobile?

Yes. The site is fully responsive and every tool works in mobile browsers as well as on desktop — no app required.

Do I need to install or sign up for anything?

No installation and no account are required. Open any tool and start using it instantly in any modern browser.