Reverse Lines — Flip Line Order in Text
Flip the order of lines in a list or document while preserving text on each line.
How it works
- 1Paste or type your text in the input field
- 2Click "Reverse Lines" — processing happens in your browser
- 3Copy the result or download as a text file
What to do next
About Reverse Lines
Reverse Lines is a self-contained text processing workspace. Flip the order of lines in a list or document while preserving text on each line. Open the page, get the result, close the tab — that is the entire workflow.
Reverse Lines sees the most use from editors comparing manuscript drafts and writers cleaning copy before publishing, but the design is intentionally generic enough that you do not need a specialist background to get a good result. The defaults aim at the most common case so a first-time user can get the right output without changing any settings.
Reach for Reverse Lines when you need a predictable result on a single file. The page works on the first visit, the controls are visible without a menu, and the output is delivered the moment the engine finishes.
Internally the tool runs on standard browser APIs — the same processing stack used by professional desktop pipelines, just compiled for the browser. 0 MB is the practical ceiling, set so the tool stays responsive on phones and older laptops.
Reverse Lines is structured so the question "where is my file processed?" has a single answer: in your browser tab. The engine, the controls, and the result panel are all on one page. Navigating away or closing the tab clears the page's memory the way it does for every other tab.
Reverse Lines is intentionally narrow in what it does, which makes it easy to slot into a longer workflow. Take its output, hand it to whichever next tool fits the job, and Reverse Lines stays out of your way until the next time you need it.
The hard constraints are easy to remember. Maximum input: 0 MB. Multiple files per run: no — one input at a time, by design, to keep results predictable. The same controls apply on every run.
Reverse Lines is built around steady iteration on a small set of options rather than feature creep. Every additional setting attracts a slightly different audience, but a long settings panel makes the common case slower for everyone. The current controls reflect what users of the tool actually use.
Output handling is intentionally boring: Reverse Lines produces a single output file and triggers your browser's standard "save" behaviour. If you have a default download folder configured, that is where it will land. There is no Favtoo-side history of jobs you have run.
Reverse Lines is one example of a broader pattern: utility software increasingly works as single-page, client-side experiences. Every page in the catalog is shaped that way, which keeps each tool fast to load and easy to recommend in a single link.
Reverse Lines runs as a regular web page, so there is no install step or permission grant before the first run. The page can be audited by viewing the source or by watching the developer-tools Network tab while a job runs.
Pro tip: Reverse Lines works just as well in a private/incognito window as in a normal one, which is occasionally useful when you want zero browser-history footprint of the job. Another tip: if the tool ever feels slow, it is almost always because the browser tab is competing for CPU with another tab — pausing or closing the heavy ones gives the engine room to work.
For most failure modes, refreshing the page and re-running the job is enough — the engine has no persistent state to corrupt. If the same input fails twice in a row, the input itself is most likely the problem (a truncated file, an unexpected variant of the format, or a stream the engine does not recognise).
That is essentially everything Reverse Lines does and how it does it. Open the tool above, drop in your input, and the work happens in the page. If you find yourself reaching for it often, bookmark the page — it loads quickly on subsequent visits, and your most-recent settings are remembered for the rest of the session.
How it works
- 1Open Reverse Lines in your browser. The page loads quickly and the tool is ready to use the moment it becomes interactive.
- 2Select the text file you want to process — drag-and-drop and the file picker both work.
- 3Adjust the options to match what you need. Sensible defaults cover the most common case, so you can usually skip this step.
- 4Hit the run button. standard browser APIs does the work in your browser tab.
- 5Save the output when it is ready.
- 6Run additional jobs as needed. The same controls and defaults apply on every run.
Common use cases
- Encode user input safely before pasting it into HTML using Reverse Lines.
- Reformat a JSON blob copied from a log into something readable.
- Generate a slug from a long article title.
- Diff two drafts of a document side by side.
- Convert a column of names into a comma-separated list for a script.
- Count the words in a draft to check it fits a brief.
- Translate plain text into Markdown for a static-site post.
- Find and replace dozens of variants of a phrase in one pass.
- Sort a list of items alphabetically before publishing it.
- Strip messy formatting out of copy pasted from a PDF.
FAQ
Are blank lines preserved?
Yes — empty lines remain in the sequence, which shifts position when the whole line order is reversed.
Does it reverse characters on each line?
No — only the vertical order of lines changes; use a different tool if you need per-line character reversal.
What line ending styles are supported?
Browser text areas normalize newlines; pasted Windows or Unix files should split into lines consistently.
Can I reverse a CSV safely?
It reverses whole lines, not rows by key — backup your file first and verify columns still align for your use case.
Is my data uploaded?
No — line reversal is computed entirely client-side.
Why is the last line now first?
That is the definition of reversing — the bottom of your input becomes the top of the output.
How often is Reverse Lines updated?
Reverse Lines is updated whenever the underlying engine releases an improvement or a bug fix. Because the tool is delivered as a static page, every visit fetches the latest version automatically — there is no "version" to manage on your end. If a particular release ever changes default behaviour, the change is documented on Favtoo's changelog so you can confirm what shifted.
Will Reverse Lines keep working if my Wi-Fi drops mid-task?
Once the page is loaded, Reverse Lines can complete jobs without an active internet connection — the engine is bundled with the page, so there is no per-job network call. The initial page load does require a connection (to fetch the static assets), but after that you can disconnect entirely and the tool will still work. This is a side-effect of the local-first architecture, not a deliberate "offline mode" feature.
Do I need a specific browser to use Reverse Lines?
Reverse Lines works in any modern browser released in the last few years — Chrome, Edge, Firefox, Safari, Brave, Arc and the major Chromium derivatives are all supported. The underlying engine relies on widely-supported web APIs, so there is nothing exotic to install. If you are on a very old browser version and the tool fails to load, updating to the latest release of your preferred browser is the only fix needed.
Does Reverse Lines match what professional tools produce?
Reverse Lines is built on standard browser APIs, which is the same class of engine used by professional text processing pipelines. For deterministic operations, the output is byte-identical to what an equivalent CLI run would produce; for operations involving a codec or a model, the result is well within the range of what comparable tools generate. If you have a specific reference output you need to match, run a small test job first to confirm the configuration produces what you expect.
Will I notice a difference in the output from Reverse Lines?
Reverse Lines is built to preserve quality wherever the underlying text format allows it. Operations that are mathematically lossless (e.g. structural transformations, lossless re-encoding) round-trip with no perceptible change. Operations that involve a lossy codec inevitably introduce small artefacts at the byte level, but the defaults aim at the sweet spot where output looks or sounds the same to a normal viewer or listener while still being meaningfully smaller or faster than the input.
Can I process multiple files at once with Reverse Lines?
Reverse Lines processes one input at a time by design — it keeps memory usage predictable on lower-end devices and makes results easier to verify. To handle a folder, run the tool once per file; the page stays loaded between runs and remembers your last-used settings, so the second run is essentially instant.
How is Reverse Lines different from desktop apps that do the same thing?
Desktop apps usually have more advanced features but require installation, maintenance and (often) a licence. Paid online tools are convenient but route your file through their servers and gate downloads behind accounts. Reverse Lines sits in between: free, instant, and private, but intentionally narrow in scope. For one-off jobs and the common text processing operations, it is usually the lowest-friction choice; for highly specialised work, a dedicated app is still the right answer.