More Developer Tools
233 free more developer tools tools in the Developer Tools collection — every one runs in your browser with no signup and no uploads. Page 3 of 3.
User-Agent Parser
Break a browser User-Agent string into browser, engine, OS and device.
MAC Address Lookup
Decode a MAC address — vendor OUI, unicast/multicast and local/universal.
DNS Record Explainer
Understand DNS record types and parse any zone-file line.
Glob Pattern Tester
Test glob patterns against a list of paths in real time.
Time Ago Calculator
How long ago was a date — in plain language.
HAR File Viewer
Inspect a .har network capture without uploading it.
Open Graph Tag Preview
Preview your Open Graph link card and generate the meta tags.
IPv6 Expander
Expand a compressed IPv6 address to its full 8-group form.
IP Class Finder
Find the class (A–E) and scope of any IPv4 address.
Rotate PDF Pages
Turn sideways or upside-down PDF pages the right way up, then export.
Two's Complement Calculator
Signed decimal to two's complement binary and hex.
Binary Arithmetic Calculator
Add, subtract, multiply, divide and bitwise on binary numbers.
PDF Watermark
Stamp a text or image watermark onto every page of a PDF — opacity, position and rotation, all in your browser.
Gantt Chart Maker
Plan a project timeline with tasks, dependencies and a critical path — then export a PNG.
URL Parser
Break a URL into protocol, host, port, path, query and hash.
Slug From Title
Turn a headline into a short, clean URL slug.
PDF Text Extractor
Pull all the text out of a PDF and copy or download it as a .txt file.
Add Page Numbers to a PDF
Stamp Bates-style page numbers onto any PDF — position, format and font your way.
Chart Maker
Paste a table, pick bar, line or pie, then export a high-resolution PNG.
HTML Live Editor
Write HTML, CSS and JS and see the result render live.
PDF Metadata Editor
View and edit a PDF's title, author, subject and keywords, then export.
PDF Form Filler
Load a fillable PDF, type into its fields, then flatten and download.
Data Anonymizer
Mask emails, names, phones and cards in CSV or JSON with realistic fakes.
Sign PDF Online
Draw or type a signature, place it on any page, and download a signed PDF.
PDF N-up: Multiple Pages Per Sheet
Arrange 2, 4, 6, 8, 9 or 16 PDF pages on one sheet for printing.
PDF Cropper
Trim page margins and set a new crop box on every page — preview and download.
Delete Pages from a PDF
Remove unwanted pages from a PDF and download the trimmed file.
ZIP Archive Explorer
Open a .zip in your browser, browse its files, preview text and images, and extract any file.
PDF Booklet Imposition Tool
Reorder PDF pages into 2-up saddle-stitch booklet print order.
PDF Text Per Page
Extract the text from each PDF page into a labelled, copyable list.
XPath Tester & Evaluator
Run XPath 1.0 expressions against your XML and see every matching node — live, in your browser.
Chmod Calculator
Tick read, write and execute boxes — get the octal chmod command.
Line Height Calculator
Convert line-height across all CSS units, see leading, and check readability.