Merge PDF combines any number of PDF files into a single document in the order you choose — drag files to reorder them before merging. Drop your PDFs, rearrange as needed, and download the merged file in seconds. All processing happens in your browser using pdf-lib — your files are never uploaded to a server. Free, no account needed.
Related: SplitCompressPDF to JPGRotate
Your files and inputs stay in your browser — nothing is uploaded or stored.
Merge PDF Combine multiple PDFs in the order you choose — drag to reorder files, one merged download. It lives in DevBench's PDF collection — open it in any modern browser with JavaScript enabled. There is no install step and no account wall: you get the UI immediately so you can paste input, tweak options, and copy output during real debugging sessions.
Like the rest of DevBench, this workflow runs entirely in your browser by default. Your text and files are processed with client-side JavaScript, which means they are not sent to our servers for routine formatting or conversion — open DevTools → Network and you should see no upload when you use the core controls. That makes these tools practical for internal payloads, configs, and drafts when you want to avoid unnecessary cloud round-trips.
Start from the controls above: paste or type into the labelled fields, upload when the tool supports files, and watch results update as you work. If output looks unexpected, verify encoding (UTF-8), line endings, and whether the tool expects structured input such as JSON, YAML, CSV, or hex. Many utilities include copy buttons or downloadable results so you can drop answers straight back into tickets, CI logs, or documentation.
If you need deterministic automation at scale, shell scripts and CI pipelines still win — use DevBench to prototype the transform and validate edge cases, then port the same logic into your stack when you are happy with the behaviour.