Step 1: Drop the PDF onto the canvas
Drag the .pdf onto app.svgsketch.com or choose File > Import.... The dialog lists the pages with their sizes; select the ones you want. Multi-page files import as one document with a view per page.
Step 2: Keep or outline the text
Text is kept editable by default, mapped to the font by name with weight and style; a font you do not have is listed in the report with "Load fonts". "Convert text to outlines" uses the glyph outlines embedded in the PDF, which is the choice when the rendering must not depend on fonts at all.
Step 3: Check layers and the report
Optional content groups become layers in the Elements panel. The report under File > Last Import Report... names shadings that were rasterized, blend modes, soft masks and anything dropped, so you know what to look at before shipping.
Step 4: Export SVG
Choose SVG in the Export panel with "Optimize with SVGO" enabled. Every page view exports as an SVG view, so the file can also go back out as a multi-page PDF.