I have been building a collection of free developer tools at theappsfirm.com/tools. Every tool runs 100% in your browser — no signup, no server uploads, your data stays private.
Here is the full list organized by category:
PDF Tools (10)
| Tool | What it does |
|---|---|
| PDF Merge | Combine multiple PDFs |
| PDF Split | Extract specific pages |
| PDF Compress | Reduce file size |
| PDF to Image | Convert to JPG/PNG |
| Image to PDF | Images to PDF |
| PDF Rotate | Rotate pages |
| PDF Watermark | Add watermarks |
| PDF Page Numbers | Add page numbers |
| PDF Protect | Password protect |
| PDF Unlock | Remove password |
Formatters & Minifiers (9)
| Tool | What it does |
|---|---|
| JSON Formatter | Format & validate JSON |
| HTML Formatter | Beautify HTML |
| JS Formatter | Format JavaScript |
| SQL Formatter | Beautify SQL queries |
| XML Formatter | Format XML |
| HTML Minifier | Minify HTML |
| CSS Minifier | Minify CSS |
| JS Minifier | Minify JavaScript |
| Markdown Preview | Live preview |
Network & Security (8)
| Tool | What it does |
|---|---|
| DNS Lookup | Query DNS records |
| WHOIS Lookup | Domain registration info |
| HTTP Headers | Check response headers |
| SSL Checker | Verify SSL certificates |
| IP Lookup | IP geolocation |
| Password Generator | Secure passwords |
| Bcrypt Generator | Hash passwords |
| User Agent Parser | Parse UA strings |
Encoders & Converters (10)
| Tool | What it does |
|---|---|
| Base64 | Encode/decode Base64 |
| URL Encoder | Encode/decode URLs |
| JWT Decoder | Decode JWT tokens |
| Binary Converter | Binary/dec/hex/oct |
| Hex Converter | Hex/RGB/HSL/text |
| HTML Entity | Encode/decode entities |
| URL Parser | Parse URL components |
| IDN Punycode | Unicode domains |
| Image to Base64 | Image to data URI |
| JSON/CSV | Convert between formats |
Generators (10)
| Tool | What it does |
|---|---|
| UUID Generator | Generate UUIDs |
| QR Code | Generate QR codes |
| Hash Generator | MD5/SHA hashes |
| Lorem Ipsum | Placeholder text |
| Slug Generator | URL-friendly slugs |
| Barcode | Generate barcodes |
| Favicon | Create favicons |
| Meta Tags | SEO meta tags |
| Robots.txt | Generate robots.txt |
| Mailto Link | Build mailto links |
Image Tools (10)
| Tool | What it does |
|---|---|
| Image Compressor | Reduce image size |
| Image Resizer | Resize images |
| Format Converter | Convert formats |
| Background Remover | Remove backgrounds |
| Passport Photo | Passport photos |
| Beauty Filters | Photo filters |
| Image Enhancer | Enhance photos |
| EXIF Reader | Read photo metadata |
| QR Code Reader | Decode QR codes |
| YT Thumbnail | Download thumbnails |
And More...
Calculators, code tools (Regex, cURL converter, Cron builder, Diff checker), text tools, color tools, and more.
Try them all at: theappsfirm.com/tools
What tools would you want to see added?
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