SPF Record Generator — DNS TXT
Generate an SPF DNS TXT record with IPv4, IPv6, include, and MX directives and policy selection.
How it works
- 1Configure your options above
- 2Click "Generate SPF Record" — processing happens in your browser
- 3Copy or download the result
What to do next
About SPF Record Generator
SPF Record Generator is a free, in-browser web utility tool. Generate an SPF DNS TXT record with IPv4, IPv6, include, and MX directives and policy selection. The page exposes a small surface — input, controls, output — so a first-time visitor can complete the job without reading documentation.
SPF Record Generator is shaped for the gap between "I'll do it by hand" and "I'll script it." When the job is small enough that automating it would take longer than doing it, but annoying enough to want a focused tool — that is the situation this page is built for.
The execution path is auditable from the page itself: open developer tools, switch to the Network tab, run a job. The requests you see are static-asset GETs for the engine and the page resources. The actual work is JavaScript code running against the bytes already in your tab's memory.
Behind the controls you see, standard browser APIs is doing the actual web and productivity utility. Formats are detected on load and the engine produces a deterministic output for any given input + options combination — useful when you need to re-run a job and expect identical results.
A practical note on limits: SPF Record Generator accepts inputs up to 0 MB per run, and the tool processes one input at a time to keep memory usage predictable. If you ever bump into the ceiling, the cause is the size of the input.
Typical users of SPF Record Generator include community managers planning posts, marketers running campaigns and product managers comparing options. The thread connecting all of them is the same: a focused web and productivity utility task that fits cleanly into a browser tab and benefits from a tool with sensible defaults and minimal setup.
SPF Record Generator returns the result as a download. If you are running multiple jobs, the output names will not collide as long as the input names differ. You can re-run with different settings as many times as you like; each run produces a fresh file with no caching trickery in between.
Once you have used SPF Record Generator, the natural next steps depend on what you are doing with the result. Common follow-ups include DKIM Record Generator, DMARC Record Generator, and Email Header Analyzer. These are surfaced on the page so you do not have to hunt the catalog manually.
Some notes on the design of SPF Record Generator. The page is intentionally narrow: one input, the controls relevant to the task, and one output. Adding unrelated features would make the common case slower for the majority of users, so the surface is held to what people actually use.
Some context on why SPF Record Generator exists in this form: modern File APIs, high-performance JavaScript engines, and well-maintained open-source libraries now make it possible to perform web and productivity utility work entirely in the browser. SPF Record Generator is built on top of that capability, which is why a single page can host the full pipeline.
SPF Record Generator produces deterministic output: the same input plus the same options always produces the same result. That predictability matters when the result has to match an upstream specification or be reproducible later.
Tips from users who reach for SPF Record Generator regularly: process one input first to confirm the settings produce what you expect before committing to a batch; treat the page as the working surface and avoid leaving large jobs running in a backgrounded tab where the browser may throttle JavaScript; and if a particular file fails, check whether the source is intact by opening it in its native viewer — most "tool errors" are actually input errors.
If SPF Record Generator appears to hang, the engine is almost certainly still working — large inputs simply take longer to process inside a browser than they would on a server with multi-core scheduling. For inputs near the 0 MB cap, give it up to a minute on a typical laptop before assuming something is stuck.
SPF Record Generator is one of many single-purpose tools in the catalog. Each is built around the same single-page model. Use this one, close the tab, and come back the next time you need the same job done. None of the tools require prior knowledge of the others — each page is self-contained.
How it works
- 1Reach the SPF Record Generator page in your browser to begin.
- 2Add your web utility input by dropping it onto the page or browsing for it.
- 3Tweak the controls if the defaults are not quite right for your input. The options are kept short and labelled in plain language.
- 4Trigger processing. standard browser APIs reads your input, applies the transformation, and writes the result back into the page.
- 5Grab the output as soon as the run completes. You can also copy the result instead of downloading if the next tool in your workflow accepts pasted input.
- 6Re-run with different settings as often as you want. Each run produces a fresh output and the original file on disk is never modified.
Common use cases
- Audit a marketing page before launch using SPF Record Generator.
- Run a fast accessibility check before publishing.
- Generate a campaign asset in seconds for a quick test.
- Pull a quick reference number for a status update.
- Validate a setting before circulating it to a team.
- Generate a temporary asset for a social post.
- Compare two product variations side by side.
- Create a placeholder image for a wireframe.
- Sanity-check a webhook response while debugging.
FAQ
What is SPF?
Sender Policy Framework specifies which mail servers can send email for your domain.
What policy should I use?
Start with ~all (softfail) while testing, then move to -all (fail) for strict enforcement.
DNS lookup limit?
SPF allows a maximum of 10 DNS lookups. Each include and MX directive counts as one.
Private?
Yes — generated locally.
Multiple IPs?
Add multiple IP addresses separated by commas. Each gets its own ip4: or ip6: mechanism.
Third-party senders?
Add include: directives for services like Google (include:_spf.google.com) or SendGrid.
Can I use SPF Record Generator with formats other than the defaults?
The accepted formats are listed in the upload area on the tool itself. If your input is in a format that is not directly supported, convert it first using one of Favtoo's converter tools — every Favtoo converter outputs a file that is a clean input to the next tool in the chain.
Which browsers are supported by SPF Record Generator?
SPF Record Generator 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 SPF Record Generator reduce quality of the result?
SPF Record Generator is built to preserve quality wherever the underlying web utility 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.
How many times per day can I use SPF Record Generator?
Inputs are capped at 0 MB per file, which keeps memory usage stable across phones, tablets and older laptops. You can run SPF Record Generator as often as you need; every run produces a full-quality result.
Are there any restrictions on using SPF Record Generator at work?
SPF Record Generator can be used for personal and commercial work alike — there is no separate "business" licence to purchase. The output you generate is yours to use however you want, including in client deliverables, internal documents, or commercial products. Favtoo's only ask is fair, individual use; the tool is not designed to be embedded as a backend service or wrapped behind an API for resale.
Can I call SPF Record Generator from a script?
SPF Record Generator is a browser-only tool by design and does not expose a hosted API. The reason is the same as the privacy story: there is no Favtoo backend doing the work, so there is no service to call. If you need to script the same transformation, the underlying engine (standard browser APIs) is open-source and can be used directly from your own code.
What permissions does SPF Record Generator need to function?
SPF Record Generator only needs the standard web platform — file picker access for the inputs you choose to load, and optionally clipboard access if you copy the result rather than downloading it. There is no microphone, camera, geolocation or background-permission request, because none of those are needed for the work the tool does.
How do I run SPF Record Generator over a folder of files?
SPF Record Generator 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.
Is SPF Record Generator really free?
SPF Record Generator is free to use. The processing runs in your browser, which keeps the per-user cost low enough that the tool can be offered openly. The download is the same file the engine produced — you can use it for as many runs as you need.