URL Encoder/Decoder Online — Free & Private
Encode text for use in a URL, or decode it back. Free, private, and processed entirely in your browser — no upload, no account, no file ever leaves your device.
How to use URL Encoder/Decoder
Encode text for use in a URL, or decode it back. Everything runs in this tab — nothing is uploaded for the core job.
- Enter your content — Type or paste what you want to work with — URL Encoder/Decoder runs immediately in your browser.
- Choose your options — Set any options URL Encoder/Decoder offers.
- Get your result — Copy or download the result \u{2014} done entirely on your device, nothing uploaded.
Privacy proof for URL Encoder/Decoder
This tool processes files in your browser. Open DevTools → Network while you run it: your document is not uploaded. After one online visit, many tools keep working with Airplane Mode on (libraries cached locally).
Popular tools
The highest-demand tools with full options — browse by category below for the rest.
Star any tool — it appears under Favorites on this device.
How this actually works
Each tool runs entirely with JavaScript already loaded in this page — PDF tools via pdf-lib and pdf.js, image tools via the browser's native Canvas API, and everything else with plain JavaScript. Your files or input are read into browser memory, processed, and handed back as a download or copyable result. This page itself is served by a small Laravel route; Laravel never sees your files either. The only backend in use is Supabase, and only for two optional things: signing in with a magic link, and — only if you're signed in — a log of which tool you ran and when. Honest limits worth knowing: Compress PDF flattens each page to a re-encoded image (great for scans, not ideal if you need selectable text after); HEIC conversion uses a small on-demand converter when the browser cannot decode HEIC natively (Safari often works without it); Fill PDF Form is best-effort for simple AcroForm fields, not a full Adobe Forms replacement; and Word/Excel/PowerPoint ⇄ PDF genuinely needs a server-side engine, so it isn't included — this build only ships tools that can honestly run client-side.
Questions people actually ask
What does URL encoding actually do?
Replaces characters that aren't safe in a URL (spaces, &, ?, #, and others) with a %XX escape sequence, so the text can be safely used inside a URL's query string or path without being misread.
What's the difference between this and Base64?
Different purposes — URL encoding makes text safe to embed in a URL specifically; Base64 represents arbitrary binary or text data as printable characters for other contexts (like email attachments or data URLs). Use whichever matches where the encoded text is actually going.
Does it handle emoji and non-English characters?
Yes — encodeURIComponent (what this uses) correctly handles full Unicode text, not just ASCII.
What happens if I decode invalid input?
You'll get a clear error (a stray % not followed by valid hex digits) rather than garbled output.
Should I encode an entire URL, or just part of it?
Typically just the parts going into a query parameter value (like a search term or redirect URL) — encoding an entire URL including http:// and slashes would break it, since those characters need to stay literal.
Is this the same as encodeURI vs encodeURIComponent in JavaScript?
This uses encodeURIComponent specifically, the stricter of the two (encodes more characters) — the right choice for encoding a single value to embed in a URL, as opposed to encoding a whole URL that already has its own structure.
Is there a length limit?
No fixed limit — very long input just takes proportionally longer, since it all happens in your browser.
Is my text sent anywhere?
No — encoding and decoding use the browser's own built-in functions, entirely client-side.
Is this really free, and is there a file size limit?
Yes — no account, no paywall. Since processing happens in your browser's memory rather than uploading anywhere, the practical limit is your device's available RAM, not a server quota. Very large files (500+ pages) may run slower, especially for Compress and PDF→JPG.
Does anything about my file get sent anywhere?
No. Every tool runs with pdf-lib/pdf.js loaded in this page; your file is read into browser memory and never leaves it. The only network call this app makes for your account is Supabase auth — and that only stores which tool you ran and when, never file content.
Why isn't Word/Excel/PowerPoint → PDF included?
Converting Office formats accurately needs a real rendering engine (what Word or LibreOffice use internally) — no browser library does this reliably. Rather than ship a broken version, it's left out.
Does TechDriven Tools have OCR (text recognition)?
Yes — OCR PDF recognizes text in scanned or photographed pages using Tesseract.js, running entirely on your device, and gives you a searchable PDF or a plain text file. Nothing is uploaded for this either.
Can I use this without an internet connection?
Once the page and its libraries have loaded once, yes — the tools themselves need no network access. Signing in and viewing history do require a connection, since those talk to Supabase.
What happens to the "history" if I sign in?
Only a row per tool run — the tool's name and a timestamp. No filename, no file content, ever. You can see the full list any time via the History button.
Are the non-PDF utilities (password generator, JSON formatter, etc.) private too?
Yes — same rule as the PDF tools. Word Counter, Case Converter, Password Generator, UUID Generator, Base64, Hash Generator, JSON Formatter and JWT Decoder all run with plain JavaScript already loaded in this page; nothing you type or paste is sent anywhere.
URL Encoder/Decoder, in depth
Encode text for safe use in a URL, or decode an encoded URL back to readable text.
Features
Percent-Encoding
Converts special characters to their %XX safe form.
Decode
Turn an encoded URL or query string back into readable text.
Standards-Based
Uses the browser's own encodeURIComponent/decodeURIComponent.
Instant
No network call — everything happens locally.
Why use URL Encoder/Decoder
- Build a query parameter safely from text containing spaces or special characters.
- Decode a confusing URL full of
%20and similar codes into readable text. - Debug an API request where encoding might be the source of an issue.
- Prepare a value for a redirect link that needs to survive being passed through a URL.
How it works
Certain characters (spaces, &, ?, #, and others) have special meaning inside a URL and need to be "escaped" as a percent sign followed by their hex code to appear literally. This tool uses the browser's own standards-based encoding functions, so the result matches exactly what any real browser or server would produce or expect.
A note on full URLs vs. components
Encoding an entire URL and encoding one value meant to go inside a URL (a query parameter, for example) aren't quite the same operation — encoding a full URL's own slashes and colons would break it. This tool is built for encoding a text value you intend to place inside a URL, which is the more common everyday need.
Why people search for URL Encoder/Decoder
Encode text for use in a URL, or decode it back. For teams, share the link instead of emailing binaries of desktop installers — everyone gets the same URL Encoder/Decoder behavior in a modern browser.
URL Encoder/Decoder sits in our Developer Tools group. The page is built so you can finish the job without creating an account, installing a desktop pack, or sending the payload to an unknown converter API.
Who URL Encoder/Decoder is for
- You want a second opinion after another converter produced a weird output.
- You need a result now and do not want another account wall.
- The file or text is sensitive enough that uploading feels wrong.
- A desktop suite is overkill for a one-page or one-photo job.
Recommended workflow
Paste only what you intend to transform → run locally → copy into your editor or terminal → never paste production secrets into random upload sites.
- Open URL Encoder/Decoder (also available from category hubs and ⌘K).
- Use the labeled fields or dropzone — options match what URL Encoder/Decoder actually does.
- Run the tool and wait for local progress to finish.
- Download or copy the result, then verify on the device where you will share it.
Tips that improve results
- Rename the output with date + purpose before you attach it to email.
- On phones, plug in power for large PDFs, videos, or spreadsheets.
- Prefer UTF-8 text for developer converters; weird encodings cause most “broken” results.
- Start with a non-sensitive sample so you learn the options before the real file.
- Change one setting at a time when you are comparing quality or layout.
- Keep the original until stakeholders accept the download.
Common mistakes with URL Encoder/Decoder
- Expecting URL Encoder/Decoder to replace a full desktop suite for every edge-case format.
- Skipping a sample check and discovering a bad export after the original was deleted.
- Chaining many lossy image/PDF steps when one careful pass would have been enough.
- Using a public computer without clearing downloads afterward.
Privacy model
Processing for URL Encoder/Decoder is designed to stay in the browser. Laravel serves the page; it does not receive your file bytes for conversion. Optional Supabase auth only stores which tool you ran and when — never filenames or contents.
Related tools
- Password Generator
- Base64 Encoder/Decoder
- Hash Generator
- JSON Formatter
- JWT Decoder
- QR Code Generator
FAQ — URL Encoder/Decoder
Is URL Encoder/Decoder free to use?
Yes. URL Encoder/Decoder on TechDriven Tools is free — no account, no watermark, and no paywall for the core workflow.
Does URL Encoder/Decoder upload my file or text?
No for processing. URL Encoder/Decoder runs in your browser tab. Optional sign-in never stores file contents — only tool names and timestamps if you enable history.
When should I use URL Encoder/Decoder?
Use URL Encoder/Decoder for Developer Tools jobs where privacy and speed matter: quick one-offs, sensitive inputs, or checking another app’s result without another upload site.
Will URL Encoder/Decoder work on my phone?
Yes in a modern mobile browser. Large inputs can take longer because your device does the work locally.
What are the limits of URL Encoder/Decoder?
There is no server quota from us. Limits are your device memory, battery, and formats the browser can decode. URL Encoder/Decoder will not pretend to support server-only Office or cloud-AI pipelines.
How is URL Encoder/Decoder different from upload-based sites?
Upload converters send your content to someone else’s server. URL Encoder/Decoder keeps the transform on-device whenever the format allows, which is the safer default for confidential documents, photos, tokens, and configs.
Bottom line
If you need URL Encoder/Decoder done quickly and privately, start at /url-encoder-decoder, run it once on a sample, then process the real input. That is how TechDriven Tools stays competitive: honest capabilities, labeled UI, and content that matches what the tool actually ships.
From our blog: How to URL-Encode and Decode Text