SQL Query Formatter — Pretty-Print SQL
Pretty-print SQL queries with keyword highlighting, indentation, and configurable keyword casing.
How it works
- 1Paste or type your text in the input field
- 2Click "Format SQL" — processing happens in your browser
- 3Copy the result or download as a text file
What to do next
About SQL Query Formatter
SQL Query Formatter is a developer tool that runs in your browser. Pretty-print SQL queries with keyword highlighting, indentation, and configurable keyword casing. The page you are reading is the same workspace you will use to do the work: pick a file or paste your input, choose the options that matter to you, and the tool produces the result on your device.
Typical users of SQL Query Formatter include QA engineers writing repro cases, data analysts wrangling JSON and students learning new languages. The thread connecting all of them is the same: a focused developer utility task that fits cleanly into a browser tab and benefits from a tool with sensible defaults and minimal setup.
SQL Query Formatter performs the transformation entirely inside the JavaScript runtime. Your file lives in the tab's memory while the engine works on it; the result lives in the tab's memory until the browser triggers the download. Both are released when the tab closes, the way every browser tab releases its memory.
Architecturally, SQL Query Formatter is a single-page client. The processing layer is standard browser APIs; the UI is a thin React shell on top. Inputs flow through the engine and the output is returned to the browser as a Blob you can save or copy. The 0 MB cap is the only hard limit and it exists to keep memory usage stable on every device.
SQL Query Formatter works well as a bookmarked utility you reach for when you need it. The first visit shows you what the tool does; the second is when you realise it is a low-friction option for the task and worth keeping in your tab list.
If your task needs more than one step, chain SQL Query Formatter with SQL to MongoDB Converter, SQL to Prisma Schema, and SQL Schema Visualizer. Each tool produces output that is a clean input to the next, so multi-step workflows are just a matter of opening the next tool in a new tab and continuing.
The download is delivered as a clearly named file the moment processing completes — no email link, no "your result will be ready in 5 minutes" queue, no expiry timer. The file is generated in your browser and saved by your browser's normal download flow.
A practical note on limits: SQL Query Formatter 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.
The transformation in SQL Query Formatter is deterministic — the same input plus the same options produces the same result every run. That predictability matters when the result has to match an upstream specification or be reproducible later.
Some background on the design choices behind SQL Query Formatter: every option you see on the page is there because a real workflow needs it, and every option that is not shown has been deliberately omitted to keep the common case fast. The bias is toward minimal-but-complete.
If you want to get the most out of SQL Query Formatter, three small habits help. Drag-and-drop is faster than the file picker once you get used to it. The keyboard shortcut for downloading the result is whatever your browser uses for "save link as," because the result is a normal download. And if you are working on a sensitive file, processing in an Incognito or Private window is a good extra layer — it leaves no trace in browser history when the tab closes.
Common gotchas worth flagging: the supported formats are listed in the upload area. The 0 MB ceiling is per-file, not per-session; you can run as many separate jobs as you like, but a single oversized input will be rejected on load.
As a single-page tool, SQL Query Formatter stays focused on one developer utility step. Multi-step workflows are composed by chaining adjacent tools — each tool produces a standard file the next one can read directly, so a longer pipeline is just a sequence of short tab-and-tab visits.
Open the workspace above to start using SQL Query Formatter. The engine loads on the first interaction so the page itself stays light, and once the tool is warm it processes subsequent jobs quickly. The moment the page is interactive, the tool is ready to do real work on your file.
How it works
- 1Reach the SQL Query Formatter page in your browser to begin.
- 2Select the developer file you want to process — drag-and-drop and the file picker both work.
- 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.
- 5Save the output when it is ready.
- 6Run additional jobs as needed. The same controls and defaults apply on every run.
Common use cases
- Compare two API responses to spot a regression using SQL Query Formatter.
- Inspect a payload during local development without writing a script.
- Generate boilerplate from a single specification line.
- Generate a quick fixture without leaving the browser.
- Decode a token to confirm its claims during a debugging session.
- Hash a string for a quick reproducibility check.
- Convert between data formats while wiring up an integration.
- Encode binary content for transport in a JSON body.
FAQ
Which SQL dialects are supported?
The formatter works with standard SQL keywords shared across MySQL, PostgreSQL, SQL Server, and SQLite.
Does formatting change query behavior?
No — only whitespace and keyword casing are modified. The query logic and results remain identical.
Can I choose lowercase keywords?
Yes — use the keyword case option to choose UPPERCASE or lowercase formatting.
Does it handle subqueries?
Basic subqueries are formatted. Deeply nested CTEs may need manual adjustment.
Is my SQL stored?
No — formatting runs entirely in your browser. Nothing is logged or uploaded.
What about stored procedures?
The formatter focuses on DML/DDL statements. Complex procedural SQL may not format perfectly.
What input formats are supported by SQL Query Formatter?
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.
Is there a programmatic version of SQL Query Formatter?
SQL Query Formatter 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.
Does SQL Query Formatter work on a phone or tablet?
SQL Query Formatter runs in any modern mobile browser — Safari, Chrome, Firefox and the in-app browsers in most messaging apps all support the underlying APIs. Performance depends on the device: a recent phone handles typical inputs nearly as fast as a laptop, while older devices may take a few seconds longer near the 0 MB ceiling. The interface lays out cleanly on small screens, so you do not need to pinch-zoom to see the controls.
Does SQL Query Formatter support batch processing?
SQL Query Formatter 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.
What does the error message in SQL Query Formatter mean?
Failures usually fall into one of three buckets: the input is in an unsupported format, the input is over the size cap, or the input is structurally malformed (a truncated download, a partial export, or a stream the engine does not recognise). The first two are easy to confirm — check that your file is in a supported format and that it is below 0 MB. For the third, opening the file in its native viewer first is the fastest way to confirm the source is intact.
How long does SQL Query Formatter take to process a file?
Most jobs finish in seconds. Speed scales with input size and with how many CPU cycles your browser tab has available — the engine runs in your browser, so it shares resources with whatever else you have open. For inputs near the 0 MB ceiling, expect anywhere from a few seconds to roughly a minute on a typical laptop. Closing other heavy tabs noticeably speeds things up.
How many times per day can I use SQL Query Formatter?
Inputs are capped at 0 MB per file, which keeps memory usage stable across phones, tablets and older laptops. You can run SQL Query Formatter as often as you need; every run produces a full-quality result.